Full Breakdown
Double Murder of USF Doctoral Students: Investigation, AI Queries, and Ongoing Search for Nahida Bristy
4/27/2026, 12:28:16 PM
The Crime and Immediate Findings
University of South Florida doctoral students Zamil Limon and Nahida Bristy, both 27, were last seen on April 16. Limon’s body was recovered on the Howard Franklin Bridge in black utility trash bags, showing numerous lacerations, stab wounds and a deep wound that penetrated his liver. Prosecutors allege that Bristy was “disposed of in a similar way.” Human remains were later discovered in the waterways south of the bridge; they have not been positively identified. Hisham Abugharbieh, the 26-year-old roommate, has been charged with two counts of pre-meditated first-degree murder with a weapon, unlawful moving of a dead body, failure to report a death, tampering with evidence, false imprisonment and battery. He remains jailed without bond.
Background & Context
Both victims were Bangladeshi nationals pursuing doctoral studies at USF. Their disappearance sparked a multi-agency response from the Hillsborough County Sheriff’s Office, the Pinellas County Medical Examiner’s Office, and university police. The case gained national attention after court documents revealed the suspect’s use of the AI chatbot ChatGPT to seek advice on concealing a body.
Key Figures & Groups
- Zamil Limon – 27, USF doctoral student, victim.
- Nahida Bristy – 27, USF doctoral student, missing and presumed dead.
- Hisham Abugharbieh – 26, roommate and alleged perpetrator; represented by a public defender.
- Hillsborough County Sheriff’s Office – Lead investigative agency; Sheriff Chad Chronister issued public statements.
- Pinellas County Medical Examiner – Conducted autopsy confirming homicide by multiple sharp-force injuries.
- State Attorney’s Office – Prosecutors seeking pre-trial detention.
Timeline of Events
- April 13 – Abugharbieh asked ChatGPT what would happen if a person were “put in a black garbage bag and thrown in a dumpster.”
- April 15 – He queried ChatGPT about changing a VIN number and possessing a gun without a license.
- April 16 – Limon and Bristy were last seen near the USF campus.
- April 17 (after midnight) – He asked ChatGPT whether cars are checked at Hillsborough River State Park.
- Friday (date unspecified) – Limon’s body was found on the Howard Franklin Bridge.
- Friday morning (April 24) – Abugharbieh was arrested after a domestic-violence call at his home.
- Late Sunday (April 26) – Human remains were recovered from waterways south of the bridge.
Data & Statistics
- Victims: 2 (both 27).
- Suspect: 1 (26).
- Charges: 2 counts of first-degree pre-meditated murder, plus five additional felonies.
- Injuries: Limon sustained multiple sharp-force injuries, including a stab wound to the lower back that pierced the liver.
- Evidence: Blood-pattern analysis showed significant blood in the shared apartment’s foyer, kitchen, hallway and bedroom; a CVS receipt listed trash bags, Lysol wipes and Febreze.
Official Statements & Responses
Sheriff Chronister described the case as “deeply disturbing” and emphasized the community impact. Prosecutors argued that the “brutal and violent nature of the offense” creates a “probability of danger” should the suspect be released, noting that “no conditions of release will reasonably protect the community.” The State Attorney’s Office spokesperson reiterated that the suspect remains a danger and should stay detained pending trial. The suspect’s public defender has not commented.
Conflicting Reports & Gaps
- The newly recovered human remains have not been positively identified as Bristy’s.
- Abugharbieh’s phone pinged the bridge where Limon’s body was found, yet he claims he never drove near Clearwater or the bridge.
- No official comment has been received from the suspect’s defense team regarding the ChatGPT queries.
Verbatim Quotes
- “This is a deeply disturbing case that has shaken our community and impacted many who were hoping for a safe resolution,” — Sheriff Chad Chronister
- “The brutal and violent nature of the offense where the victims were killed by the defendant establishes a probability of danger his release poses to the safety of the community,” — Prosecutors (pre-trial detention motion)
- “No conditions of release will reasonably protect the community from risk of physical harm.” — Prosecutors (pre-trial detention motion)
- “prosecutors will argue that he remains a danger to the community and should remain behind bars until trial,” — Erin Maloney, State Attorney’s Office spokesperson
- “How would they find out.” — Hisham Abugharbieh (ChatGPT query cited in court documents)
What’s Next
A pre-trial detention hearing is scheduled for Tuesday, where prosecutors will seek to keep Abugharbieh incarcerated. Law enforcement continues to search for Bristy’s remains and to investigate the extent of the suspect’s planning, including the role of AI-generated advice.
