11/16/2012 09:40 am ET Updated Nov 16, 2012

Christian Aguilar, Murdered University Of Florida Student, Allegedly Drugged And Suffocated By Friend Pedro Bravo (PHOTOS, VIDEO)

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Thursday, a day before Christian Aguilar would have turned 19, family and friends learned the details about how the University of Florida freshman was murdered. Authorities allege that Pedro Bravo, 18, drugged and suffocated Aguilar, who was last seen alive with Bravo on September 20 via surveillance cameras at a Gainesville Best Buy.

The two friends, who both graduated from Doral Academy Preparatory, moved to Gainesville last summer when Aguilar began classes at University of Florida and Bravo enrolled at Santa Fe College.

Hunters found Aguilar's remains about 60 miles southwest of Gainesville in Levy County on October 12, almost three weeks after he was reported missing.

The two had apparently been arguing over Aguilar dating Bravo's ex-girlfriend from Doral, also a Santa Fe student. Bravo told police he punched Aguilar in the face, forced him out of his truck, and left him severely beaten by the side of a road.

However, authorities now believe Aguilar was not just left to die after a physical alteration but poisoned as well.

“Once we found the body, it gave us some new information, so we made some changes in the indictment. …We believe the evidence will show the administration of a chemical compound for the purpose of sedating [Aguilar] so he can do injury,’’ State Attorney Bill Cervone told the Gainesville Sun.

Bravo is now charged with witness tampering, poisoning by food or water, providing law enforcement with false reports, providing law enforcement with false information and the illegal transportation of a dead human body in addition to first-degree murder, kidnapping and depriving a crime victim of medical care.

Christian Aguilar Missing In Gainesville