By Debbie Emery - Breaking Celebrity News Reporter

Infamous cult killer Charles Manson has been behind bars for more than 40 years, but police are hoping that old tape recordings of conversations between right hand man, Charles “Tex” Watson, and his former attorney could reveal hidden secrets of more murders.

The Los Angeles Police Department have been given permission to access eight cassette tapes containing hours of conversation between Watson and now-deceased Texas attorney, Bill Boyd, reported the Los Angeles Times.

U.S. Bankruptcy Judge Brenda T. Rhoades in Plano, Texas, granted the request but Watson’s current lawyer still has 14 days to attempt to overturn the decision.

As Breaking Celebrity News previously reported, a California prison panel denied parole to 77-year-old Manson in April following his 12th bid for freedom.

The LAPD now believe that the taped conversations between Watson, who is currently in prison serving multiple murder convictions, and Boyd could provide evidence of unsolved murders tied to the Manson family.