Los Angeles police have obtained the decades-old taped conversations between a Manson family disciple and his attorney.
Detective David Holmes says the department has had the tapes for a couple of weeks and Robbery-Homicide Division and the Los Angeles County district attorney's office are analyzing them.
A federal judge ruled in March that Charles "Tex" Watson waived his right to attorney-client privilege when he allowed his lawyer to sell the eight cassette tapes to an author nearly 40 years ago for a book on his life.
The tapes are being reviewed to determine whether there's evidence that could resolve unsolved murders.
Watson is serving a life sentence for his role in the 1969 murders of actress Sharon Tate and six others. He sought to prevent turnover of the tapes.