Two Charged With Murder in Separate Hillsborough Fentanyl Overdose Deaths

The Hillsborough County Sheriff's Office has arrested two people on first-degree murder charges in separate investigations into fatal fentanyl overdoses, applying a Florida statute that allows prosecutors to charge a drug distributor with murder when the substance sold causes a death. Both defendants are accused of unlawfully distributing fentanyl that led to a victim's death, and both are presumed innocent unless and until convicted.

In one case, detectives allege that Robinson Stlouis, 39, sold fentanyl to a victim identified in the investigation as Rogers, with the transaction alleged to have occurred on October 17, 2025, the day after the two met. Stlouis was charged with murder on August 7. In the second case, detectives arrested Haley Williams on a warrant on August 6, charging her with first-degree murder resulting from the unlawful distribution of a controlled substance.

Both investigations were conducted by the sheriff's office's Opioid Overdose Investigations Section, a dedicated unit that treats fatal overdoses as potential homicides rather than as accidental deaths, working backward from the death to identify the source of the drugs.

The statute behind the charges

Florida law provides that a person who unlawfully distributes certain controlled substances, including fentanyl and its analogs, commits first-degree murder if the substance is proven to be the proximate cause of a user's death. The offense is classified as a capital felony under the statute.

The provision was expanded by the Legislature as fentanyl deaths rose, and it represents a significant departure from traditional drug prosecution. A distributor faces the same charge classification as someone who commits a premeditated killing, without the state needing to prove any intent that the user die.

Proving these cases requires a specific evidentiary chain. Prosecutors must establish that the defendant distributed the substance, that the substance the defendant distributed is the substance that caused the death, and that it was the proximate cause of death rather than one contributing factor among several.

That chain is why these investigations take time. The Stlouis case involves an alleged transaction in October 2025 with charges filed in August 2026, a gap of roughly ten months reflecting toxicology analysis, digital forensics on phones, and the work of tracing a transaction backward from a death scene.

How the investigations work

The Opioid Overdose Investigations Section responds to fatal overdoses as it would to any suspicious death, processing the scene, collecting evidence including phones and any remaining substances, and preserving material for laboratory analysis.

Digital evidence is typically central. Text messages, messaging application records and payment application transactions frequently document a purchase, and those records establish the connection between a decedent and an alleged supplier in a way that witness testimony often cannot.

Toxicology determines cause of death and identifies which substances were present. Many overdose deaths involve multiple substances, which complicates proximate cause analysis and is a recurring point of contention in these prosecutions.

Chemical analysis of any recovered substance establishes what was actually sold. A recurring pattern in fentanyl deaths involves counterfeit pills pressed to resemble prescription medication such as oxycodone or alprazolam, sold to buyers who believed they were purchasing a pharmaceutical product.

Sheriff Chad Chronister said that fentanyl disguised as legitimate prescription medication is one of the deadliest threats facing the community.

The counterfeit pill problem

The counterfeit pill phenomenon is what distinguishes the current overdose crisis from earlier phases. A buyer purchasing what they believe to be a prescription pill has no way to know its actual contents, and pressed pills contain wildly inconsistent amounts of fentanyl even within a single batch.

Fentanyl is potent enough that the difference between a dose and a fatal dose is measured in micrograms, which means inconsistent mixing in an unregulated production process produces pills that vary from ineffective to lethal within the same batch.

This dynamic has changed who dies. Overdose deaths increasingly include people with no history of opioid use disorder who took a single pill obtained from a social contact or through a social media transaction, a population that traditional harm reduction outreach was not designed to reach.

Naloxone, the opioid overdose reversal medication marketed under the brand name Narcan, is available without a prescription in Florida and is distributed free through many county health departments and community organizations. It reverses opioid overdoses including those involving fentanyl, though multiple doses are sometimes required.

The debate over murder charges for distribution

These prosecutions have generated substantial policy debate. Supporters argue that distributors bear moral and legal responsibility for foreseeable deaths, that the deterrent effect is real, and that families of victims are entitled to accountability that a possession or distribution charge does not provide.

Critics, including some public health researchers, argue that the statutes frequently reach people who are themselves users sharing or selling small quantities to support their own use rather than commercial traffickers, and that the threat of a murder charge discourages people from calling 911 when someone overdoses.

Florida has a Good Samaritan provision that grants limited immunity from certain drug possession charges to a person who seeks medical assistance in good faith for someone experiencing an overdose. That immunity is limited and does not extend to all offenses, and its scope is often misunderstood by the people it is meant to protect.

Whether these prosecutions reduce overdose deaths is an empirical question that has not been settled. Research on deterrence in drug markets generally finds limited effects from severity of punishment relative to certainty of apprehension, but that research does not address these statutes specifically.

The fentanyl picture in Florida

Fentanyl and its analogs have driven overdose mortality in Florida for the better part of a decade, displacing prescription opioids and heroin as the dominant cause. Medical examiner data compiled by FDLE tracks drug-related deaths by substance and by county, and it is the authoritative source for Florida overdose statistics.

Enforcement efforts across the state have targeted distribution networks. The Jacksonville Sheriff's Office announced 87 arrests earlier this year in a long-term narcotics operation targeting drug trafficking and street-level distribution in the city's urban core, funded through the state's fentanyl eradication grant program.

Hillsborough County, which includes Tampa, is Florida's fourth most populous county, and its overdose burden reflects both its population and its position on the Interstate 4 and Interstate 75 corridors that carry traffic across the state.

Treatment access remains the other half of the response. Florida operates a network of licensed substance use treatment providers, and medication-assisted treatment using buprenorphine or methadone is the intervention with the strongest evidence base for opioid use disorder.

Tampa Bay's response beyond enforcement

Hillsborough County operates overdose prevention and response programs alongside the enforcement work, and the two run in parallel rather than in sequence. County health services, hospital emergency departments and community organizations distribute naloxone, and Florida law permits pharmacies to dispense it without an individual prescription under a standing order.

Emergency medical services in the region track overdose call volume, which functions as a near real-time indicator of local drug supply changes. Spikes in calls concentrated in a short window often signal that a particularly potent batch has entered circulation, and public health agencies issue alerts when those patterns appear.

Medication-assisted treatment is available through licensed providers across Tampa Bay, and Florida's Medicaid program covers it. Access barriers persist, including waiting lists, transportation and the requirement in some programs for daily dosing, which is difficult for people holding jobs.

Fentanyl test strips, which allow a user to check a substance for fentanyl before use, were reclassified in Florida to remove them from the definition of drug paraphernalia, making their distribution lawful. Harm reduction organizations distribute them alongside naloxone, though they detect presence rather than quantity, which limits what a negative or positive result actually tells a user.

What's next

Both cases proceed through the Thirteenth Judicial Circuit, which covers Hillsborough County, with charging decisions made by the State Attorney's Office for that circuit. Case status is public record through the Hillsborough County Clerk of Court.

First-degree murder is a capital felony in Florida, and the State Attorney determines whether to seek the death penalty in cases where it is available. That decision, when made, is filed with the court and becomes public.

Both defendants are entitled to counsel, and those who cannot afford an attorney are represented by the public defender for the Thirteenth Circuit. Cases resolve through dismissal, plea or trial, and the charges announced at arrest may differ from those ultimately filed.

Residents seeking naloxone, treatment referrals or information about the state's Good Samaritan provisions can contact the Florida Department of Children and Families substance abuse services, county health departments, or the national helpline operated by the Substance Abuse and Mental Health Services Administration.

Families of overdose victims occupy a difficult position in these cases. Some have advocated forcefully for distributor prosecutions, describing them as the only form of accountability available after a preventable death. Others have opposed charging the person who supplied drugs to their family member, particularly when that person was a friend or fellow user rather than a commercial dealer.

Prosecutors exercise discretion in deciding which cases to pursue under the statute, and that discretion is where the distinction between a trafficker and a peer who shared drugs gets drawn. Charging decisions in Florida are made by elected state attorneys, which places the question within local democratic accountability.

Victim services are available through the state attorney's office in each circuit, and Florida operates a crime victim compensation program administered by the Attorney General's Office that can cover funeral expenses and counseling for eligible families.

Anyone experiencing a suspected overdose emergency should call 911 immediately. Naloxone can be administered by a bystander with no medical training, it does not harm a person who is not experiencing an opioid overdose, and it buys time for emergency responders to arrive. Delay in calling is the factor most consistently associated with fatal outcomes.