Days before two University of South Florida graduate students vanished, a chilling series of questions surfaced on an AI chatbot, allegedly posed by their roommate. Hisham Abugharbieh, 26, now stands accused of their murders, and investigators uncovered a disturbing digital trail suggesting premeditation.
The court filing reveals Abugharbieh’s unsettling inquiries to ChatGPT, beginning with a direct question about concealing a body in a dumpster. When the AI responded with warnings about the dangers involved, he pressed further, coldly asking, “How would they find out?” This initial query set off a cascade of red flags for law enforcement.
Subsequent searches on the AI platform revealed a pattern of disturbing research. Abugharbieh allegedly sought information on altering a vehicle identification number and the legality of possessing an unlicensed firearm. The digital footprint painted a picture of someone actively planning and considering methods to evade detection.
Investigators also discovered searches with a chillingly specific focus on violence. Questions like, “Has there been someone who survived a sniper bullet to the head?” and “Will my neighbors hear my gun?” added layers of grim detail to the unfolding investigation. These weren’t idle curiosities; they were calculated considerations.
The disappearance of Zamil Limon, 27, and his girlfriend, Nahida Bristy, 27, prompted a frantic search. A mutual friend reported them missing after being unable to reach them on April 17th. The initial break in the case came with the discovery of Limon’s ID, glasses, and credit cards discarded in a dumpster near the apartment he shared with Abugharbieh.
A CVS receipt found nearby offered further clues: trash bags, Lysol wipes, and Febreze – items suggesting a desperate attempt to conceal evidence. Bloody clothing was also recovered, intensifying the suspicion surrounding Abugharbieh. A search of his apartment revealed similar bags hidden under his bed and within the same dumpster, ultimately containing Limon’s body.
Authorities traced Abugharbieh’s vehicle to the Clearwater area using traffic camera footage, noting inconsistencies in his initial statements to police. He offered conflicting accounts before a search warrant could be obtained for his phone, which ultimately revealed his presence near a bridge around 1:30 a.m. on the night of the disappearance, using his phone’s flashlight for several minutes.
While Bristy’s location remained unknown during the initial bail application, her shoes and purse were found inside the shared apartment. A subsequent search led to the discovery of additional human remains, currently undergoing identification by the Pinellas County Medical Examiner’s Office.
Abugharbieh’s past revealed a history of violent behavior. Court records show prior charges for battery and burglary in 2023, alongside two separate violence-related cases in 2023 and 2025. His own mother reported to deputies that he struggled with anger management issues.
A restraining order request filed by his brother detailed a recent outburst where Abugharbieh “trashed the living room” during a violent tantrum. The brother described a pattern of abuse, including being punched in the face and their mother being kicked in the back, expressing fear for the safety of his younger siblings.
Now facing charges including battery, false imprisonment, tampering with evidence, unlawfully moving a dead body, failing to report a death, and two counts of first-degree murder, Abugharbieh is being held without bail. The possibility of the death penalty looms if he is convicted, marking a grim chapter in this unfolding tragedy.
The arrest itself was a dramatic scene. After barricading himself inside a home for over an hour, Abugharbieh surrendered to police wearing only a towel, captured on aerial footage. The image served as a stark visual representation of a life spiraling into darkness.
