After a University of Florida student's murder in 2012, convicted killer Pedro Bravo orchestrated an elaborate prison scheme to seem innocent.

The murder of University of Florida freshman Christian Aguilar shocked the campus and his hometown of Miami in 2012. More than a decade later, the case took stunning new turns, authorities ...

Doug Finger/AP - PHOTO: Pedro Bravo's defense attorneys look at a photo of slain University of Florida student Christian Aguilar during Bravo's murder trial in a courtroom in the Alachua County ...

For three weeks, hundreds of volunteers searched the dense woods and swamps around Gainesville for any sign of Aguilar. His father, Carlos Aguilar, told "20/20" he made a promise: "We're not leaving.