VINCENT BUGLIOSI, deputy district attorney. He is 74 and the author of several books, including Helter Skelter (cowritten with Curt Gentry), the definitive account of the case. The whole thing with William Garretson, the caretaker at the Tate home, is strange. They found him there in the morning, and they placed him under arrest. He was the only live body on the premises. He told the police that he did not know that these murders had taken place. He was asked, “How could you not have known about it?” He said, “I didn’t hear it.” They asked, “Didn’t you hear any screams?” And he said, “No.” From an LAPD report, I learned that during the night Garretson had been listening to music on his hi-fi. When they arrested him, the volume knob was somewhere between four and five, and five was as loud as it would go. I told the LAPD, “Go back into the guest house, turn the volume on the stereo up to four-and-a-half, shut the door, and then have someone inside the residence fire the revolver that was used in the killings, and see if they can hear it in the guest house.” They reported back that they couldn’t.