Sheen was listed as a suspect in a criminal investigation report received on March 31, LAPD officer Matthew Ludwig revealed.
He declined to detail the allegations or identify the alleged victim, but said detectives from the department’s Threat Management Unit have obtained a search warrant in the case.
Celebrity news site RadarOnline reported it had been served a subpoena from Los Angeles police for a 35-minute audio recording purportedly of Sheen threatening his ex-fiancee, Scottine Ross.
She performed in porn films under the name Brett Rossi and is suing Sheen for having sex with her without disclosing he is HIV positive.
“We believe the search warrant is illegal and violates federal and state law prohibiting the use of search warrants against media companies who are reporting news and information,” Dylan Howard, editor-inchief of The National Enquirer and editorial director of RadarOnline.com, wrote in a statement.
The site has not posted the audio, but described it as being recorded by one of Sheen’s former lovers.