As the investigation into the disappearance and death of University of South Florida (USF) doctoral student Zamil Ahamed Limon deepens, authorities have revealed that his vehicle sat stationary in a campus parking lot for more than 14 hours after he was officially reported missing on April 17. A phone charger remained plugged into the dashboard, suggesting the car was abandoned abruptly and that Limon may not have returned to retrieve it or continue his day.

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This new detail fits into the already scrutinized timeline of April 16, when Limon and fellow USF doctoral student Nahida Bristy, 27, vanished within roughly 60 minutes of each other. Limon’s remains were identified on April 24 after being found on the Howard Frankland Bridge over Tampa Bay. His roommate, 26-year-old Hisham Saleh Abugharbieh (also spelled Abugharbeih), faces two counts of first-degree premeditated murder with a weapon in the deaths of both Limon and Bristy, who remains missing.

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The Car as a Key Piece of the Puzzle

Limon was last seen around 9:00 a.m. on April 16 at the off-campus apartment on Avalon Heights Boulevard he shared with Abugharbieh. Approximately one hour later, Bristy was observed near the Natural & Environmental Sciences (NES) Building on the USF Tampa campus, carrying her backpack and leaving behind her laptop, iPad, and lunchbox in a lab — items indicating she expected a routine return.

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Phone records showed Limon’s device ringing three times that morning before switching abruptly to voicemail — a stark contrast to his reputation for always answering calls from family in Bangladesh. Both students’ phones soon went offline.

The discovery that Limon’s car remained parked in the same campus lot well into the following day, with the charger still connected, raises questions about his movements and intentions that morning. Did he drive to campus and leave the vehicle expecting to return shortly? Or was the car left behind as events unfolded rapidly at or near the shared apartment? Investigators are examining the vehicle for additional forensic evidence, including fingerprints, biological material, or electronic data from the infotainment system or connected devices.

This detail joins other anomalies noted in the case: the apartment door found slightly ajar (unusual for the security-conscious Limon) and items collected in evidence bags from the kitchen counter. Together, they suggest the apartment may have been the epicenter of whatever occurred during that critical 60-minute window.

The Standoff, Arrest, and Escalating Charges

On April 24, the same day Limon’s remains were recovered on the Howard Frankland Bridge, deputies responded to a domestic violence call at a residence in the Lake Forest community linked to Abugharbieh. Family members were safely removed, but he barricaded himself inside for nearly 20 minutes before surrendering to SWAT — reportedly stepping outside wearing only a towel.

Abugharbieh, a former USF student, had been interviewed at least twice as a person of interest and reportedly stopped cooperating in one session. Evidence gathered during and after the arrest, combined with the bridge discovery, enabled detectives to link him directly to Limon’s remains. Authorities stated they believe he acted alone.

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Initial charges included unlawfully holding or moving a dead human body, failure to report a death with intent to conceal, tampering with physical evidence, false imprisonment, battery, and domestic violence-related offenses. By April 25, these were upgraded to two counts of first-degree premeditated murder with a weapon in the deaths of Limon and Bristy. Abugharbieh is being held without bond at the Falkenburg Road Jail. An autopsy on Limon is ongoing to determine cause and manner of death.

Lives of Promise Cut Short

Zamil Limon, studying geography, environmental science, and policy with interests in AI applications, and Nahida Bristy, pursuing chemical engineering, were ambitious international students from Bangladesh who maintained close daily contact with families overseas. Their sudden silence triggered widespread concern and mobilized the Bangladeshi diaspora and USF community.

The plugged-in phone charger in Limon’s car, the unlocked apartment door, and the stationary vehicle now form part of a mosaic of digital, physical, and witness evidence that investigators are assembling. The 60-minute gap on April 16 remains central to understanding how two promising scholars went from routine academic activities to tragedy.

USF has offered counseling and support services while cooperating fully with law enforcement. The case has highlighted vulnerabilities faced by international graduate students, including isolation in off-campus housing and reliance on cross-time-zone family bonds.

Search for Nahida Bristy Continues

As of April 26, Nahida Bristy’s whereabouts remain unknown. Hillsborough County Sheriff’s Office marine and dive teams continue searching Tampa Bay waters near the Howard Frankland Bridge. The anomalies surrounding Limon’s car and apartment may yet yield clues that assist in locating Bristy or confirming the full sequence of events.

Anyone with information is urged to contact the Hillsborough County Sheriff’s Office at (813) 247-8200 or USF Police. Public tips remain critical, particularly those related to the students’ vehicles, phone activity, or observations around the apartment or campus on April 16.

This developing case — marked by unanswered calls, a car left idle with its charger connected, an unlocked door, and evidence from the kitchen counter — continues to unfold. For the families in Bangladesh, each new detail brings both hope for answers and deepened sorrow over two bright futures interrupted.

This article draws from official HCSO statements, press conferences, and reporting by multiple news outlets. Details such as the full forensic analysis of Limon’s vehicle, complete contents of evidence bags, and any potential motive remain under active investigation and are subject to update. Charges are allegations; Abugharbieh is presumed innocent until proven guilty in a court of law.