The nine were convicted last Friday after the judge found them guilty of all charges relating to the rape and sexual assault of Vilikesa Soko.
The 30-year-old victim was arrested in connection with a robbery in Nadi two years ago but later died in hospital as a result of the injuries he sustained at the hands of the police.
They will be sentenced this Friday.
Manasa Talala, Seruvi Caqusau, Kelevi Sewatu, Penaia Drauna, Filise Vere, Viliame Vereivalu, Jona Davonu and Senitiki Natakasavu were each found guilty of the rape and sexual assault of Mr Soko and Mr Boila.
The military officer, Pita Matairavula, a former bodyguard for the prime minister Frank Bainimarama, was found guilty of the same charges.
Talala and Verivalu were also found guilty of defeating the course of justice by instructing other police officers to make false statements.