"Nothing in the records indicate that he ever returned there before he killed himself," he said, adding deputies are not looking for any other suspects.
The FBI and the Florida Department of Law Enforcement were among the hundreds of authorities searching for Marcano. Meanwhile, friends and family held a prayer vigil and passed out flyers desperate to find the missing teen.
"At this time, we cannot identify a cause of death, so I don't' want to speculate on that," Mina said of Marcano's death during a news conference Saturday.
Mina says they notified her parents just hours ago, adding "our hearts are broken".
"Everyone wanted this outcome to be different," he said. "As a sheriff, as a father, obviously we are grieving at the loss of Miya."
Caballero's criminal history revealed one prior arrest in 2013 for using a destructive device resulting in property damage and discharging a weapon on school property, according to the Florida Department of Law Enforcement.
An arrest report said Polk County sheriff's deputies were called to the campus of Warner University after a report of a bomb going off inside a dorm. The explosive turned out to be a toilet bowl cleaner concoction inside a plastic drink bottle. The report said Caballero admitted to using the improvised explosive as a "prank" on other residents of the dorm. No one was injured.
The apartment complex where Marcano and Caballero worked, Arden Villa, released a statement saying "all potential employees are vetted through a national background check services provider," and no records of burglary or sexual assault were found involving Caballero.
- AP