The cause of death is "pending toxicology and investigation," the Tarrant County ME's website said.
The Keene police investigation has turned up several persons of interest in the death of Aaron Alexander Preston, 22, of Keene. These persons may have information about the case or are known to have been with the vicitm before his death, Alberti said.
These people have been interviewed. No arrests have been made at this time, Alberti said.
"The investigation is ongoing, with a significant amount of manpower from the Keene Police Department dedicated to this case," Alberti said. "Investigators from the District Attorney's Office and the Cleburne Police Department have also been assisting throughout the investigation."
The situation began at about 10:59 p.m. Tuesday, when Keene Police Sgt. Chip Krieger and Officer Cody Moss responded to a call of a deceased person in the 100 block of S. Eastern St. in Keene, Alberti said.
Keene EMS also responded to the scene. Officers made entry into the residence and found a deceased white male, later identified as Preston, Alberti said.
Preston was a senior at Southwestern Adventist University majoring in biology and chemistry, but was not currently enrolled, university officials said.
Investigators on the scene believed the death to be of a suspicious nature and called for a crime scene unit from the Metroplex, Alberti said.
The investigation is ongoing at this time, the chief said.
Updates to this story will be made as further information becomes available.