The LAPD wants to know if a 40-year-old sexual assault claim against Bill Cosby is legit — and they want it from the horse’s mouth. And the detectives who will do the interview — assuming Cosby consents — are elite. As it was previously reported … the LAPD is already on the hunt for documents and interviews from people at the Playboy Mansion to determine if Cosby was even there when the alleged incident took place. Judy Huth filed a police report Friday … saying she was 15 when Cosby got her drunk in 1974 … then sexually assaulted her at the famous mansion.