Heroin Charges Lawyers in San Diego County

Heroin charges in San Diego range from misdemeanor possession to felony trafficking with decades in prison. Our defense lawyers fight for diversion, reductions, and dismissals. Call 24/7.

A heroin charge in San Diego changes everything overnight. Whether it’s simple possession, an allegation of sales, or a transportation case tied to the border corridor, the consequences are real and they escalate fast.

Most people facing heroin charges never imagined being in this situation. Maybe addiction took hold after a legitimate prescription ran out. Maybe you were in the wrong car with the wrong people. Maybe law enforcement jumped to conclusions about “intent to sell” based on the amount you were carrying for personal use. The circumstances that lead to heroin charges are rarely black and white.

Here’s what matters right now: charges are accusations, not convictions. The prosecution still has to prove every element beyond a reasonable doubt. And for heroin cases specifically, the difference between a felony that sends you to state prison and a misdemeanor that qualifies for diversion often comes down to one thing: the defense strategy.

At David P. Shapiro Criminal Defense Attorneys, we’ve defended clients facing the full spectrum of heroin-related charges throughout San Diego County. As experienced San Diego drug crimes defense lawyers, we handle everything from simple possession cases where diversion gets the charge dismissed entirely, to serious trafficking allegations where we challenge the search, the seizure, and the prosecution’s theory of intent. We know how these cases work in San Diego courts, and we know how to fight them.

The sooner we start, the more options you have. Evidence fades. Witnesses forget. The window for the strongest defense is now.

Quick Reference: Heroin Charges in California

Offense	Classification
Simple Possession (HS § 11350)	Misdemeanor (post-Proposition 47)
Possession for Sale (HS § 11351)	Felony: 2, 3, or 4 years state prison
Sale/Transportation for Sale (HS § 11352)	Felony: 3, 4, or 5 years state prison
Under the Influence (HS § 11550)	Misdemeanor: up to 1 year county jail
Weight Enhancement (HS § 11370.4)	+3 to +25 years depending on quantity
Diversion Eligibility	HS § 11350 and HS § 11550 only
Strike Offense	No (none of the above are strikes)

What Are Heroin Charges Under California Law?

Heroin, classified as diacetylmorphine, is a Schedule I controlled substance under Health and Safety Code Section 11054(c)(11).¹ That means California considers it to have high potential for abuse and no accepted medical use. The legal consequences flow from that classification.

California law doesn’t treat all heroin offenses the same. There are four primary charges, and the differences between them are enormous in terms of what you’re facing:

Simple possession (HS § 11350) is having heroin for personal use.² Since Proposition 47 passed in 2014, this is a misdemeanor for most defendants. That’s significant because it means diversion is on the table, and a dismissal is a realistic outcome.

Possession for sale (HS § 11351) is a straight felony carrying 2, 3, or 4 years in state prison.³ The prosecution doesn’t need to prove you actually sold anything. They just need to prove you intended to.

Sale, transportation, or furnishing (HS § 11352) is also a straight felony, carrying 3, 4, or 5 years in state prison.⁴ This includes selling, giving away, administering, or transporting heroin for the purpose of sale.

Under the influence (HS § 11550) is a misdemeanor for being willfully under the influence of heroin.⁵ Like simple possession, it’s eligible for diversion.

Why does the distinction matter so much? Because simple possession and being under the influence can lead to treatment and a dismissed case. Possession for sale and sale/transportation mean state prison, no diversion eligibility, and a felony record. The single most impactful thing a defense attorney can do in many heroin cases is fight to reduce a sale-related charge down to simple possession, opening the door to diversion that would otherwise be closed.

What Must the Prosecution Prove?

The elements vary depending on which heroin offense you’re charged with. Each element is something the prosecution must prove beyond a reasonable doubt, and each one is a potential point of attack for the defense.

Simple Possession (HS § 11350)

To convict you of simple possession, the prosecutor must prove ALL of the following:⁶

1. You possessed a controlled substance. This can be actual possession (on your person) or constructive possession (in a location you controlled). Mere proximity is not enough.

2. You knew of the substance’s presence. If heroin was hidden in a vehicle you borrowed, in a bag someone left at your apartment, or in a space shared with others, the prosecution has to prove you actually knew it was there.

3. You knew of its nature or character as a controlled substance. You don’t need to know it was specifically heroin, but you must have known it was some type of controlled substance.

4. The substance was in fact heroin.

5. The substance was in a usable amount. This doesn’t mean enough to get high. It means enough that it could be used as a controlled substance. Traces, residue, or debris don’t count.⁷

Possession for Sale (HS § 11351)

The prosecution must prove all five elements above, plus one more:⁸

1. When you possessed the heroin, you intended to sell it. This is where most possession-for-sale cases are fought. The prosecution typically relies on circumstantial evidence: the quantity found, how it was packaged, whether scales or pay-owe sheets were present, large amounts of cash, the absence of personal-use paraphernalia. Every one of those indicators can be challenged.

Sale/Transportation for Sale (HS § 11352)

To convict you of sale or transportation, the prosecutor must prove:⁹

1. You sold, furnished, administered, gave away, or transported for sale a controlled substance (or offered to do any of these).

2. You knew of the substance’s presence.

3. You knew of its nature or character as a controlled substance.

4. The substance was heroin.

5. The substance was in a usable amount.

A critical distinction here: following the 2014 amendment to HS § 11352, transportation must be for the purpose of sale. Simply moving heroin from one location to another for personal use is not enough for this charge.¹⁰ This is a point many prosecutors still push aggressively, and many defense attorneys miss.

Under the Influence (HS § 11550)

The prosecution must prove:¹¹

1. You were willfully under the influence of a controlled substance (heroin).

2. You knew you were using a substance that was a controlled substance.

The burden is on them to prove all of this. Beyond a reasonable doubt. That’s a high bar.

The Fentanyl Reality in San Diego

This deserves its own discussion because it affects nearly every heroin case in San Diego right now.

The reality of the situation is that much of what’s sold as “heroin” on the street today contains fentanyl, a synthetic opioid that’s 50 to 100 times more potent than morphine. This creates unique legal complications.

For defendants: Field tests may not distinguish between heroin and fentanyl. If the substance turns out to be fentanyl rather than heroin (or a mixture), the charges and applicable statutes may shift. Lab analysis becomes critical, and the defense should never accept a field test result at face value.

For more serious allegations: In cases where someone dies after using fentanyl-laced heroin, San Diego prosecutors have pursued murder charges under an implied malice theory. The argument is that a seller who knows fentanyl is deadly and sells it anyway acts with conscious disregard for human life. These cases are aggressively prosecuted and carry potential sentences of 15 years to life.

If you’re facing any heroin-related charge in San Diego, understanding the fentanyl dimension is essential. It affects everything from the lab analysis to the potential charges to the defense strategy.

Penalties and Consequences

Sentencing by Offense

Charge	Prison/Jail	Fine	Diversion Eligible?
HS § 11350 (simple possession)	Up to 1 year county jail	Up to $1,000	Yes (PC § 1000, Prop 36)
HS § 11351 (possession for sale)	2, 3, or 4 years state prison	Up to $20,000	No
HS § 11352 (sale/transportation)	3, 4, or 5 years state prison	Up to $20,000	No
HS § 11352 (across 2+ county lines)	3, 6, or 9 years state prison	Up to $20,000	No
HS § 11550 (under the influence)	Up to 1 year county jail	Up to $1,000	Yes (PC § 1000, Prop 36)

Weight Enhancements (HS § 11370.4)

For sale and transportation offenses, the quantity of heroin involved can dramatically increase the sentence. These enhancements are served consecutively, meaning they’re added on top of the base sentence:¹²

Quantity	Additional Prison Time
1 kilogram or more	+3 years
4 kilograms or more	+5 years
10 kilograms or more	+10 years
20 kilograms or more	+15 years
40 kilograms or more	+25 years

So you can see how these things snowball. A base HS § 11352 charge carrying 3, 4, or 5 years can become 8, 9, or 10 years with a one-kilogram weight enhancement. With larger quantities, you’re looking at decades.

Prior Drug Conviction Enhancement (HS § 11370.2)

Each prior conviction for specified drug offenses (including HS § 11351 and HS § 11352) can add 3 additional consecutive years to your sentence.¹³

Additional Enhancements

Enhancement	Code Section	Additional Penalty
Using a minor in a drug transaction	HS § 11353	3, 6, or 9 years state prison
Sale near a school or playground	HS § 11353.1	Additional 3 to 5 years
Armed during drug offense	HS § 11370.1	Additional 1 to 5 years
Gang enhancement	PC § 186.22	+2 to 10 years depending on offense

Immigration Consequences

For all intents and purposes, this is one of the most devastating collateral consequences of a heroin conviction, and it doesn’t get enough attention.

Any controlled substance conviction, including misdemeanor simple possession, can trigger deportation and render you inadmissible to the United States.¹⁴ Heroin is a federally controlled substance, and immigration law does not recognize California’s Proposition 47 reclassification. That means even a misdemeanor possession conviction can destroy your immigration status.

This makes diversion critically important for non-citizen defendants. Successful completion of diversion may avoid a “conviction” for immigration purposes, but the analysis is complex and fact-specific. If you are not a U.S. citizen and you’re facing any heroin charge, this issue must be addressed from day one.

Professional Licensing

A heroin conviction, even a misdemeanor, can trigger disciplinary proceedings for licensed professionals. Nurses, doctors, pharmacists, attorneys, teachers, real estate agents, and contractors all face potential licensing consequences. The licensing board’s standard is often “moral turpitude” or “substantially related” conduct, and drug convictions frequently meet both.

Employment and Housing

Felony heroin convictions create significant barriers to employment and housing. Many employers conduct background checks, and a drug sales conviction is difficult to explain. Housing applications routinely ask about criminal history, and drug-related convictions are among the most common grounds for denial.

Drug Diversion: The Most Important Topic for Most Clients

For defendants charged with simple possession (HS § 11350) or being under the influence (HS § 11550), diversion is often the single most important issue in the case. Successful completion means the charge is dismissed. Not reduced. Dismissed.

Penal Code § 1000 (Deferred Entry of Judgment)

PC § 1000 diversion is available for qualifying defendants charged with simple possession.¹⁵ What does that actually look like?

You plead guilty, but the court defers entry of judgment. You’re placed into a drug treatment program, typically lasting 12 to 18 months. You’ll be subject to drug testing, counseling sessions, and progress reports. If you complete the program successfully, the charges are dismissed and you can truthfully say you were not convicted.

What happens if you don’t complete it? The court enters the guilty plea, and you’re sentenced on the original charge. That’s why taking diversion seriously matters.

PC § 1000 is generally not available if you have a prior felony conviction within the past five years, if you’ve participated in diversion within the past five years, or if you’re charged with a sale-related offense.¹⁶

Proposition 36 (PC § 1210.1)

Prop 36 provides another pathway to treatment instead of incarceration for eligible defendants.¹⁷ It applies to simple possession and under-the-influence charges. The structure is similar to PC § 1000: complete treatment, and the case is dismissed.

Prop 36 is not available for possession-for-sale or sale/transportation charges.

What Diversion Actually Involves

Clients always want to know the practical details. Here’s the Reader’s Digest version:

Drug testing: Expect regular, random testing. Frequency varies by program but typically starts at weekly and decreases as you demonstrate compliance.

Treatment: This can include outpatient counseling, group sessions, individual therapy, and in some cases residential treatment. The type and intensity depend on the assessed level of need.

Duration: Most programs run 12 to 18 months, though some can be shorter or longer depending on the court and your progress.

Reporting: Regular check-ins with the court or probation department. You’ll need to demonstrate attendance and compliance.

Consequences of failure: If you’re terminated from the program for non-compliance, the original charges proceed. For PC § 1000, that means the guilty plea is entered. This is serious, but it’s also worth noting that most programs allow for some setbacks before termination. A single missed test or a relapse doesn’t automatically end diversion.

San Diego Drug Court

San Diego County also operates drug court programs that may provide additional diversion options beyond standard PC § 1000 and Prop 36. Drug court involves more intensive supervision but can be a powerful alternative for defendants who need structured support.

Defense Strategies for Heroin Charges

Now let’s talk about how we actually fight these cases. The right defense depends entirely on the specific facts, but here are the approaches we evaluate when building a strategy:

Illegal Search and Seizure

This is the most common and often the most effective defense in heroin cases. Period.

Heroin cases almost always start with a search: a traffic stop, a pat-down, a vehicle search, a home raid. If law enforcement violated your Fourth Amendment rights at any point during that process, we file a motion to suppress under Penal Code Section 1538.5.¹⁸ If the motion succeeds, the heroin is excluded from evidence. And without the heroin, there’s no case.

What does that look like in practice? We examine whether the initial stop was lawful, whether officers had probable cause or a valid warrant, whether they exceeded the scope of any consent you gave, and whether the search was conducted properly. In San Diego, where many drug cases originate from border checkpoint encounters and freeway stops along the I-5 and I-8 corridors, these constitutional issues come up constantly.

Challenging “Intent to Sell”

For possession-for-sale charges (HS § 11351), the prosecution relies on circumstantial evidence to prove you intended to sell. They’ll point to the quantity, the packaging, the presence of scales or baggies, large amounts of cash, multiple phones, or the absence of personal-use paraphernalia.

We can, and will, challenge every one of those indicators if the facts support a position to do so. A heavy user can possess quantities that look like “sales” amounts to someone unfamiliar with addiction. Cash has innocent explanations. Packaging can be consistent with bulk personal purchases. The absence of paraphernalia might mean nothing more than the police didn’t find it or didn’t document it.

Reducing a charge from HS § 11351 to HS § 11350 transforms the case. It goes from a state prison felony with no diversion eligibility to a misdemeanor that can be dismissed through treatment. That’s not a minor distinction. That’s the entire ballgame for many clients.

Lack of Knowledge

The prosecution must prove you knew the heroin was there and knew what it was. This matters in cases involving borrowed vehicles, shared apartments, hotel rooms with multiple occupants, or situations where someone else’s property was in your vicinity.

Imagine a situation where you’re a passenger in a friend’s car. Police pull the car over, search it, and find heroin under the passenger seat. Does that mean you possessed it? Not necessarily. The prosecution has to prove you knew it was there. Mere proximity is not possession.

Constructive Possession Challenges

Related to lack of knowledge, constructive possession requires the prosecution to prove you had dominion and control over the substance, not just access to the area where it was found. In shared spaces, this is a genuine factual question, and one we challenge aggressively.

Not a Usable Amount

Residue in a pipe, traces in a baggie, debris that can’t actually be consumed as a drug: none of that constitutes a “usable amount” under California law.¹⁹ The substance must be enough to actually be used. If the crime lab analysis shows only trace amounts, the charge fails.

Entrapment

In undercover buy operations, if law enforcement induced you to commit a drug offense you would not otherwise have committed, entrapment is a viable defense. California uses the subjective test for entrapment, focusing on whether you were predisposed to commit the crime or whether police pressure created the criminal intent.

Crime Lab and Chain of Custody Challenges

The prosecution must prove the substance is actually heroin through forensic testing. We examine the chain of custody from the moment the substance was seized through every hand it passed through to the crime lab. Contamination, mishandling, mislabeling, and inadequate testing procedures are all potential avenues. Given the fentanyl contamination issue in San Diego’s drug supply, accurate lab analysis is more important than ever.

Pursuing Diversion Strategically

For eligible defendants, securing diversion is not just a fallback option. It’s often the best possible outcome. And for defendants initially charged with sale offenses, negotiating a reduction to simple possession specifically to qualify for diversion requires strategic advocacy from the outset.

Federal vs. State: A Critical Distinction for San Diego

San Diego is a major drug trafficking corridor due to its proximity to the Mexican border. This means heroin cases here carry an added dimension that doesn’t exist in most California counties: the possibility of federal prosecution.

The DEA and Homeland Security Investigations (HSI) are active in San Diego. Larger heroin cases, particularly those involving transportation across the border or significant quantities, may be filed federally under 21 U.S.C. § 841 rather than in state court.

Federal drug charges carry different and often harsher penalties, including mandatory minimum sentences that don’t exist under California law. Everything on this page covers California state charges only. If you’re facing federal drug charges, the legal landscape is different and requires attorneys experienced in federal court.

Related Charges

Heroin cases frequently involve additional or alternative charges. Understanding the relationships between these offenses matters for defense strategy:

Charge	Code Section	Relationship to Heroin Offenses
Drug paraphernalia possession	HS § 11364	Misdemeanor; often charged alongside possession
DUI of drugs	VC § 23152(f)	If driving while under the influence of heroin
Child endangerment	PC § 273a	If children were present during drug activity
Conspiracy	PC § 182	If drug sales involved multiple parties
Armed during drug offense	HS § 11370.1	Enhancement if armed during any heroin offense

HS § 11350 (simple possession) is a lesser-included offense of HS § 11351 (possession for sale). That means even if the prosecution charges possession for sale, the jury can convict on simple possession instead if they’re not convinced of the intent-to-sell element. This is another reason why challenging intent to sell is so critical.

Facing Heroin Charges in San Diego?

When you’re facing charges that could mean state prison, a felony record, and consequences that follow you for years, you need attorneys who understand every angle of heroin defense in San Diego. From challenging the search that produced the evidence, to fighting the “intent to sell” allegations, to securing diversion that results in a dismissed case, we know how these cases work at every level. David P. Shapiro Criminal Defense Attorneys has continuously been recognized for excellence by organizations like the Better Business Bureau, SuperLawyers, and the San Diego Business Journal. We’ve defended clients facing every type of heroin charge in courthouses across the county.

Every day without representation is a day the prosecution works unopposed. The bottom line is this: your defense matters, and it needs to start now.

Call us 24/7 for a consultation. We’ll review your case, explain exactly what you’re facing, and lay out the defense strategy. Contact our team today to protect your freedom and your future.

References

1. 1. Health & Safety Code, § 11054, subd. (c)(11) [heroin (diacetylmorphine) classified as Schedule I controlled substance].↑ Health & Safety Code, § 11054, subd. (c)(11) [heroin (diacetylmorphine) classified as Schedule I controlled substance].
2. 2. Health & Safety Code, § 11350, subd. (a).↑ Health & Safety Code, § 11350, subd. (a).
3. 3. Health & Safety Code, § 11351.↑ Health & Safety Code, § 11351.
4. 4. Health & Safety Code, § 11352.↑ Health & Safety Code, § 11352.
5. 5. Health & Safety Code, § 11550, subd. (a).↑ Health & Safety Code, § 11550, subd. (a).
6. 6. See CALCRIM No. 2304 [Possession of Controlled Substance].↑ See CALCRIM No. 2304 [Possession of Controlled Substance].
7. 7. People v. Leal (1966) 64 Cal.2d 504.↑ People v. Leal (1966) 64 Cal.2d 504.
8. 8. See CALCRIM No. 2302 [Possession for Sale of Controlled Substance].↑ See CALCRIM No. 2302 [Possession for Sale of Controlled Substance].
9. 9. See CALCRIM No. 2300 [Sale, Transportation for Sale, etc. of Controlled Substance].↑ See CALCRIM No. 2300 [Sale, Transportation for Sale, etc. of Controlled Substance].
10. 10. Health & Safety Code, § 11352.↑ Health & Safety Code, § 11352.
11. 11. See CALCRIM No. 2400 [Under the Influence of Controlled Substance].↑ See CALCRIM No. 2400 [Under the Influence of Controlled Substance].
12. 12. Health & Safety Code, § 11370.4 [weight enhancements for specified controlled substance offenses].↑ Health & Safety Code, § 11370.4 [weight enhancements for specified controlled substance offenses].
13. 13. Health & Safety Code, § 11370.2 [prior conviction enhancement for drug offenses].↑ Health & Safety Code, § 11370.2 [prior conviction enhancement for drug offenses].
14. 14. See 8 U.S.C. § 1227(a)(2)(B)(i) [deportability for controlled substance offenses].↑ See 8 U.S.C. § 1227(a)(2)(B)(i) [deportability for controlled substance offenses].
15. 15. Penal Code, § 1000 [deferred entry of judgment; drug diversion].↑ Penal Code, § 1000 [deferred entry of judgment; drug diversion].
16. 16. Penal Code, § 1000 [deferred entry of judgment; drug diversion].↑ Penal Code, § 1000 [deferred entry of judgment; drug diversion].
17. 17. Penal Code, § 1210.1 [Proposition 36; treatment instead of incarceration].↑ Penal Code, § 1210.1 [Proposition 36; treatment instead of incarceration].
18. 18. Penal Code, § 1538.5 [motion to suppress evidence obtained through unreasonable search or seizure].↑ Penal Code, § 1538.5 [motion to suppress evidence obtained through unreasonable search or seizure].
19. 19. People v. Leal (1966) 64 Cal.2d 504.↑ People v. Leal (1966) 64 Cal.2d 504.