Fla. Doctoral Students’ Families Speak Out After Murder Charges: ‘Why Was No Strong Action Taken?’

The families of Nahida Sultana Bristy and Zamil Ahamed Limon called for an investigation into Avalon Heights housing, where Limon and the murder suspect had been assigned as roommates

Nahida S. Bristy (left); and Zamil Limon.Credit : 

University of South Florida Police Department; Facebook

NEED TO KNOW

The families of the doctoral students who disappeared want the University of South Florida to investigate the housing facility where they lived, according to a statement
The university has since removed Avalon Heights from its off-campus housing list and is cooperating with law enforcement
Authorities found additional human remains near one of the student’s body and sent them to the coroner’s office for identification

The families of University of South Florida doctoral students Nahida Sultana Bristy and Zamil Ahamed Limon have released a joint statement days after an arrest was made in connection with their disappearances.

Bristy and Limon, both 27, were reported missing from Tampa, Fla. on April 17.

Limon’s body was later found on Howard Frankland Bridge on Friday, April 24. His 26-year-old roommate, Hisham Abugharbieh, has been charged with two counts of murder in connection with the case.

On Sunday, April 26, the families of Bristy and Limon issued a joint-statement with requests and questions for authorities.

In a six-point memo, the families called on the University of South Florida to investigate Avalon Heights, the housing facility where investigators said Limon and Abugharbieh lived.

“We believe it is important to investigate why a roommate was assigned without proper background checks or without informing the residents of any relevant concerns,” read part of the statement.

It further demanded to know why Avalon Heights does not have proper security cameras on the property or why the “security system was not strong enough to protect its residents.”

“Even after complaints were made, why was no strong action taken?” the statement read, in part. Limon’s brother recently told WFLA that he had made complaints to Avalon Heights about Abugharbieh’s alleged behavior.

PEOPLE has reached out to Avalon Heights for comment but has not yet heard back.

The university tells PEOPLE while the school doesn’t own the apartments, they “recognize the importance of the safety and well-being of our students wherever they live” and are cooperating with law enforcement.

“We are actively working with law enforcement and relevant authorities as they investigate this tragedy, and we fully support efforts to examine all factors involved, including housing conditions and safety measures that are in place,” the statement read.

The listing for Avalon Heights on the university’s off-campus housing has been taken down from the website.

Hisham Abugharbeih arrested in a towel.Hillsborough County Sheriffs Office

Both Bristy and Limon’s families were financially reliant on them, the joint- statement further said, requesting that their bank balances, assets and salaries be forwarded to the families.

The families are requesting that Bristy and Limon’s personal belongings, including their accessories, documents, laptops and clothings be returned to them in their native Bangladesh “exactly as they were found, without being altered, hidden, or tampered with.”

They have further called for the University of South Florida to establish a memorial to honor the memories of Bristy and Limon and “to help prevent such tragedies in the future.”

Bristy has not been located.

Authorities said in a criminal affidavit obtained by PEOPLE that they have not recovered any evidence to indicate Bristy is still alive and that they found a large amount of blood in Abugharbieh’s residence that matches Bristy’s DNA.

On Sunday, April 26, the Hillsborough County Sheriff’s Office said they found additional human remains at the same location where they’d found Limon’s body, and those remains have been sent to Pinellas County coroner for identification.

FRIEND SPEAKS OUT: The Last Text from Nahida Bristy and How It Pointed Investigators Toward Suspect Hisham Saleh Abugharbieh

In the quiet final hours before their lives were shattered, two promising Bangladeshi doctoral students at the University of South Florida — Zamil Limon and Nahida Sultana Bristy — sent subtle signals that something was wrong. While a classmate recalled Zamil Limon looking visibly worried and saying he “had something to take care of tonight,” a close friend of Nahida Bristy received a text message from her just hours before the couple vanished on April 16, 2026. That message, ending with a short sentence, later drew investigators’ attention directly to their roommate, Hisham Saleh Abugharbieh.

The text, according to the friend who spoke out, carried an undercurrent of unease. Though the full content has not been publicly released due to the ongoing investigation, the closing line reportedly referenced or implicated Abugharbieh in a way that, combined with other evidence, helped shift the case from a missing persons inquiry to a double homicide probe. Friends described Bristy as responsible and communicative; any deviation in her messaging style or content stood out immediately.

This new detail adds another layer to an already harrowing timeline. Limon, 27, a doctoral student in geography, environmental science, and policy, focused his research on using generative AI to monitor Florida’s shrinking wetlands. Bristy, also 27, was pursuing a doctorate in chemical engineering. The pair, who had known each other as friends before developing romantic feelings and even discussing marriage, were last seen on the morning of April 16. Limon was spotted around 9 a.m. at the off-campus apartment on Avalon Heights Boulevard he shared with Abugharbieh and at least one other roommate. Bristy was seen about an hour later near a science building on the USF Tampa campus. Neither responded to messages afterward. A family friend reported them missing to USF police on April 17.

The Text That Raised Red Flags

The friend, who has not been named publicly, told investigators that Bristy’s final text arrived in the window when both students were still believed to be alive but possibly in distress. The message ended with a brief sentence that, in hindsight, appeared to reference tension involving Abugharbieh — the third person in the shared living situation. Whether it mentioned a specific concern, a planned conversation, or an uneasy interaction with the roommate remains protected by the active case, but it was significant enough to prompt deeper scrutiny of Abugharbieh early in the investigation.

This revelation echoes the classmate’s account of Limon’s worried demeanor and cryptic comment about having “something to take care of tonight.” Together, these two independent statements from people close to the victims suggested that Limon and Bristy may have sensed impending trouble related to their living arrangements. Roughly two weeks before the disappearance, Limon and another roommate had reportedly filed a complaint against Abugharbieh after learning details of his background, with one description characterizing his behavior as concerning or “psychopathic.” A triplicate note found in Limon’s backpack — carbon-copy style paperwork — further fueled speculation that the victims may have been documenting issues formally.

From Missing Persons to Murder Charges

What began as concern over two dedicated international students quickly escalated. On April 24, 2026, authorities discovered human remains in a black heavy-duty trash bag on the side of the northbound Howard Frankland Bridge over Tampa Bay. The remains were identified as Zamil Limon. The Pinellas County Medical Examiner’s Office ruled the death a homicide caused by “multiple sharp force injuries,” including a deep stab wound to the lower back that penetrated the liver. Additional human remains were later recovered in a waterway south of the bridge, believed to be connected to Bristy, though her body has not been fully confirmed as of late April 2026, and the search continues in some reports.

Hisham Saleh Abugharbieh, then 26, was arrested following a domestic violence call and brief standoff at a residence near the university. He now faces two counts of first-degree premeditated murder with a weapon in the deaths of Limon and Bristy, along with charges of tampering with physical evidence, unlawfully moving a dead body, failure to report a death, false imprisonment, and battery. He is being held without bond.

Court documents and prosecutors’ pretrial detention motion paint a disturbing picture of the alleged cover-up:

Blood evidence was found throughout the apartment, including in the kitchen and Abugharbieh’s bedroom.
Limon’s wallet, campus ID, credit card, eyeglasses, blood-stained clothing, and a floor mat testing positive for Bristy’s DNA were recovered from a trash compactor at the complex.
Heavy-duty black trash bags matching the one used for Limon’s remains were found under Abugharbieh’s bed.
Abugharbieh had a bandaged left pinky finger when first questioned; he claimed it was from cutting onions.
Phone location data and surveillance placed his vehicle near Clearwater Beach around the time Limon’s phone last pinged in that area. His accounts to detectives reportedly shifted when confronted with evidence.

Most shockingly, prosecutors allege Abugharbieh queried ChatGPT in the days leading up to April 16 about disposing of a human body — including questions about placing one in a black garbage bag and throwing it in a dumpster, and how authorities might detect it. The AI reportedly responded that the query sounded dangerous. He also reportedly asked about changing a vehicle VIN and keeping a gun without a license. On April 23, after the students were already missing, he allegedly searched “What does missing endangered adult mean?”

A CVS receipt dated April 16 listed trash bags, Lysol wipes, and Febreze. Another roommate reportedly saw Abugharbieh using a rolling cart to move boxes to the dumpster late on the night of the 16th into the 17th.

Lives Full of Promise, Cut Short

Zamil Limon and Nahida Bristy represented the best of international academic exchange. Both from Bangladesh, they immersed themselves in rigorous doctoral programs at USF. Limon’s work on AI-driven environmental monitoring of Florida wetlands combined cutting-edge technology with urgent ecological concerns. Bristy excelled in chemical engineering. Friends described them as focused, supportive of each other’s studies, and not prone to impulsive decisions. Their budding relationship was seen as mature and secondary to their academic goals.

The international student community at USF, along with families back in Bangladesh, has been devastated. Limon’s brother and other relatives have spoken publicly about missed warning signs and the complaint filed against the roommate. A joint statement from the families demanded the “highest possible punishment.” A GoFundMe organized by Limon’s graduate advisor has helped support the families as they grapple with travel, funeral arrangements, and unimaginable grief.

The Role of the Final Messages

The classmate’s observation of Limon’s worried expression and the friend’s account of Bristy’s last text have become pivotal. In many homicide cases, the final communications from victims provide critical context — revealing fear, plans, or conflicts that investigators might otherwise overlook. Here, the short sentence at the end of Bristy’s text allegedly helped connect the dots to Abugharbieh, reinforcing other evidence like the earlier complaint and the physical clues left behind.

These messages underscore how subtle distress signals — a concerned look, a hesitant comment, or an unusual phrasing in a text — can indicate deeper danger, especially in shared housing situations where tensions simmer behind closed doors.

Campus Safety and Broader Questions

The case has prompted difficult conversations at USF and among international student groups. Issues include roommate vetting, background checks for off-campus housing, mental health resources, and protocols for responding to missing student reports, particularly when families are overseas. The intersection of AI — used productively in Limon’s research yet allegedly weaponized by the suspect in planning — has added a modern, chilling dimension.

Abugharbieh, who had been enrolled at USF years earlier but was not a current student at the time of the alleged crimes, lived in close quarters with the victims. The complaint filed against him weeks earlier suggests the victims may have tried to address concerns formally. Whether more could have been done to intervene remains a painful question for friends, advisors, and the university.

As the investigation continues, forensic analysis of the apartment, digital devices (including partially overwritten files on Limon’s laptop), security footage, and additional witness statements is ongoing. Detectives urge anyone with information about Nahida Bristy’s whereabouts or details from April 16 to contact the Hillsborough County Sheriff’s Office.

A Haunting Reminder

The last text from Nahida Bristy, like Zamil Limon’s worried face and cryptic statement, now serves as a silent testament to two young scholars whose futures were stolen in a brutal act of alleged violence. Their dedication to science, the environment, and each other stood in stark contrast to the horror that unfolded in their shared apartment.

In the friend’s decision to speak out, there is both grief and a call for accountability. The short sentence that ended Bristy’s message — innocuous at first glance — helped investigators focus on the one person who should have been a safe presence in their lives: their roommate.

Vigils have been held on campus. The academic community mourns not only the loss of talent but the violation of trust in everyday student life. As Hisham Saleh Abugharbieh faces justice in the coming months, the families and friends of Zamil Limon and Nahida Bristy continue searching for answers, closure, and prevention of similar tragedies.

The worried look, the final text, and the triplicate note together form a tragic mosaic of warning signs that, in retrospect, scream for attention. For two brilliant minds working to better understand and protect the world, their own world ended in unimaginable violence — a story that will haunt Tampa Bay’s university community for years to come.