California Poisoning Case Highlights Expungement Law Limits

What Happened

Nearly a decade after a Berkeley, California workplace poisoning case shocked the Bay Area, the matter is back in the news. According to reports, a chemical engineer who worked at a Berkeley engineering firm was convicted of poisoning a female co-worker by allegedly tampering with her water bottle. Investigators reportedly determined the bottle contained cadmium — a toxic heavy metal — at concentrations said to be millions of times above the federal drinking water limit. The co-worker, who was allegedly captured on a hidden camera being targeted, nearly died.

The defendant, who could have faced a potential life sentence, reportedly accepted a plea agreement that resulted in probation rather than prison. According to news reports, he is now asking an Alameda County judge to dismiss the felony conviction — a form of post-conviction relief commonly referred to in California as an expungement under Penal Code section 1203.4. The alleged victim has, in connection with the pending hearing, released the hidden-camera footage that reportedly helped law enforcement build the case.

At Poseidon Defense A.P.C., we follow cases like this closely because they raise questions that come up every day in our practice: What does a plea deal really mean years later? Who qualifies for expungement in California? And when a conviction stays on record, what collateral consequences follow a person for the rest of their life?

Who May Be Liable

In a criminal case like the one reported out of Berkeley, the only party facing criminal exposure is the accused individual. Criminal liability in California is personal — employers, co-workers, and third parties generally cannot be charged for an individual’s intentional act unless they themselves participated, conspired, or aided and abetted the alleged offense.

That said, incidents of this nature can create parallel civil exposure that is separate from the criminal case:

• The individual accused may be civilly liable to the alleged victim for intentional torts such as battery and intentional infliction of emotional distress.
• An employer could, in some circumstances, face civil claims (not criminal charges) if the alleged victim can show the company failed to act on prior complaints, ignored warning signs, or negligently retained a dangerous employee.
• Property owners or premises operators might face premises-liability questions if there were security or supervision failures.

For the person facing criminal charges, however, the exposure is personal, serious, and — as this case shows — potentially permanent on their record even after a plea deal.

Legal Theories That May Apply

In a case alleging intentional poisoning, California prosecutors could pursue several theories. Each carries very different penalties and defense strategies:

• Attempted murder (Penal Code §§ 187, 664). Where prosecutors allege a specific intent to kill, this charge can expose a defendant to a life sentence.
• Poisoning / mingling harmful substances with food, drink, or medicine (Penal Code § 347). A felony that criminalizes placing a poisonous substance where another person is likely to ingest it.
• Assault with a caustic chemical (Penal Code § 244). A separate felony with its own sentencing exposure.
• Great-bodily-injury enhancements (Penal Code § 12022.7). These add significant prison time when a victim is alleged to have suffered serious harm.
• Stalking or harassment allegations (Penal Code § 646.9). Where there is an alleged pattern of targeted conduct toward a specific person.

On the post-conviction side, the key statute is Penal Code § 1203.4, which permits qualifying defendants who successfully complete probation to petition the court to withdraw their plea, enter a not-guilty plea, and have the case dismissed. It is not a true “erasure,” and certain serious felonies and sex offenses are categorically excluded.

Consequences and Remedies That May Follow

In a criminal matter, the “damages” picture looks very different from a civil case. A person convicted of a serious felony in California may face:

• Custodial time in county jail or state prison, depending on the charge and plea.
• Formal or informal probation, often with strict conditions.
• Restitution to the alleged victim for medical bills, lost wages, and related losses.
• Protective orders that may remain in place for years.
• Firearm prohibitions, often lifetime for felony convictions.
• Immigration consequences, including possible deportation for non-citizens.
• Professional license discipline for engineers, nurses, teachers, contractors, and others.
• Employment and housing barriers that follow a conviction long after probation ends.

Even where a court later grants relief under Penal Code § 1203.4, certain consequences — such as firearm restrictions, use of the conviction for sentencing in a future case, and some licensing disclosure requirements — may continue. That is why plea decisions should never be made without a clear-eyed understanding of what they really mean five, ten, or twenty years down the road.

Evidence That Strengthens a Case

Whether you are defending against new charges or seeking post-conviction relief, the evidence that matters most includes:

• Surveillance and hidden-camera footage, body-cam video, and workplace security recordings.
• Toxicology reports, lab results, and chain-of-custody documentation for any physical evidence.
• Medical records documenting the alleged victim’s symptoms, treatment, and prognosis.
• Digital evidence — emails, text messages, swipe-card logs, workplace access records, and purchase histories.
• Witness statements from co-workers, supervisors, and medical providers.
• Internal company investigations, HR files, and incident reports.
• For expungement petitions: proof of probation completion, restitution payment, rehabilitation, employment history, education, counseling, and community involvement.

In post-conviction practice, the court weighs rehabilitation heavily. A well-prepared petition tells a complete story — not just that the person met the technical requirements, but that granting relief serves the interests of justice.

What to Do Next

If you or someone close to you is facing allegations as serious as those reported in the Berkeley case — or is trying to clean up an old conviction that is still closing doors — a few practical steps matter:

1. Do not speak to investigators, employers, or insurance adjusters without counsel. Even well-intentioned statements can be used against you.
2. Preserve everything. Save emails, texts, voicemails, photos, and any workplace documentation that could be relevant.
3. Write down what you remember while the details are fresh — dates, times, people present, and the sequence of events.
4. Watch the deadlines. California has strict statutes of limitations on criminal charges and specific timing rules for post-conviction petitions.
5. Get experienced criminal defense counsel involved early. The earlier an attorney is engaged, the more options you tend to have.

If you or a loved one is navigating serious felony charges or exploring whether a past conviction can be dismissed, the team at Poseidon Defense A.P.C. is here to listen, explain your options in plain English, and help you decide the right next step.

Frequently Asked Questions

Can a serious felony conviction really be dismissed in California?

In many cases, yes — California Penal Code § 1203.4 allows people who successfully complete probation to petition for dismissal of their conviction. However, certain serious felonies, sex offenses, and cases involving state prison sentences may not qualify, and the court always retains discretion. An attorney can review your specific record to tell you what relief may be realistically available.

Does an expungement really “erase” a conviction?

Not entirely. A § 1203.4 dismissal lets you honestly tell most private employers you have not been convicted, but the conviction can still be used in future criminal cases, considered by licensing agencies, and may still trigger firearm restrictions. It is a powerful tool, but it is not a true erasure of your record.

What if I was pressured into taking a plea deal years ago?

If your plea was not knowing, intelligent, and voluntary — or if you were not properly advised of consequences such as immigration impact — you may have grounds to challenge the conviction through a motion to vacate under Penal Code § 1473.7 or similar procedures. These motions are fact-specific and time-sensitive, so prompt legal review is important.

How long do California prosecutors have to file charges in a poisoning case?

Serious felonies in California generally carry long statutes of limitations, and in some cases involving attempted murder or offenses punishable by life, there may be no limitations period at all. For other felonies, the window is typically three or six years, with extensions when the alleged conduct is only later discovered. An attorney can tell you how the clock applies to your specific allegations.

Can my employer fire me just because I was arrested?

Under California Labor Code § 432.7, most employers are not permitted to use an arrest that did not lead to conviction as the sole basis for an adverse employment action. However, protections vary by industry, licensing status, and whether a conviction ultimately results. If you believe you were wrongfully disciplined, talk to counsel quickly.

What should I do if I’m being investigated but not yet charged?

The most important thing is to avoid speaking to law enforcement without a lawyer present. Pre-charge representation can sometimes influence whether charges are filed at all, or shape the charges that are brought. Preserve relevant evidence, stay off social media about the matter, and contact a defense attorney immediately.

Will a dismissed conviction still affect my professional license?

It may. California licensing boards for engineers, nurses, teachers, contractors, and other professions often require disclosure of convictions even after a § 1203.4 dismissal. The impact depends on the board, the offense, and how much time has passed, so licensed professionals should get tailored legal advice before applying for or renewing a license.

How do I know if I qualify for expungement in California?

Eligibility generally depends on the type of conviction, the sentence imposed, and whether probation was completed without new violations. Prison sentences, certain serious felonies, and specific sex offenses are typically excluded or face stricter rules. A short consultation with a defense attorney can usually give you a clear answer about your options.

Original reporting: abc7chicago.com.