Jurors have found a sexual predator guilty of beating his cellmate to death in a dormitory at Dade Correctional Institution in Florida City.

The jury on Thursday night found 49-year-old Rickey Robinson guilty of second-degree murder in the death of 57-year-old Patrick "Sonny" Salgat in December 2010.

Robinson was serving an 18-year sentence for the 1990 sexual battery of a minor.

Salgat had been serving life in prison for the fatal shooting of Steve Bolyard, a Santa Rosa County State Attorney's investigator, in June 1990.

Robinson's sentencing is scheduled for March 1.