Serial Killer with the Disappearing Bullet

This story takes place in Los Angeles. The Serial Killer commits his crimes in many of the parks in L.A. At one time he almost kills the detective that is in charge of catching him. The reason for the killer starting down their path of killing is a horrifying story in itself. The extent the killer plans on just how he will prepare himself for these killings and the way he does them is unbelievable...