<p>SAN DIEGO (AP) Child killer David Westerfield told detectives interrogating him after the disappearance of 7-year-old Danielle van Dam, ''My life is over,'' and he asked the detectives to leave him alone with a gun.</p>
<p>A newly released videotape of the interrogation, conducted three days after Danielle was reported missing, shows Westerfield sitting in a small room fielding questions from two detectives, who pleaded with him at one point to admit to the crime and tell them where to find the girl.</p>
