The investigation comes after Sheen's ex-fiancée Brett Rossi made abuse allegations during an interview with police last Thursday, as well as reports of an alleged 35-minute audio tape in which the Two and a Half Men star threatens to have her killed.
"This piece of sh--needs to be f----ing buried," Sheen reportedly says of Rossi. "I'd rather spend 20 grand to have her head kicked in."
On the tape, which was reportedly recorded by one of Sheen's former lovers, the actor also allegedly admits that he lied to the woman about his HIV status.
RadarOnline and National Enquirer have published excerpts from the tape, but no actual audio. The website has since been served with a search warrant requesting the tape.
According to the warrant obtained by Radar, Sheen has made death threats against multiple people and Rossi genuinely fears the actor will have her killed. "Ross stated she witnessed Sheen in fits of rage and violent outbursts on numerous occasions," the warrant reads. "Ross stated that she witnessed Sheen threatened to kill his former wife Denise Richards and their children's lives. Ross stated that Sheen made threats to 'put a hit on her former boyfriend,' which Ross understood to mean Sheen wanted to hire someone to kill her former boyfriend."
Brett Rossi, born Scottine Ross, was engaged to Sheen in 2014, but the couple never married. In December, Rossi sued Sheen for assault and battery, emotional distress, false imprisonment and negligence. In the lawsuit, Rossi claims Sheen had unprotected sex with her without revealing his HIV status and that he forced her to have an abortion because he was HIV-positive.