Mack Ray Edwards walked into the Los Angeles Police Department's Foothill station on March 6, 1970, and said he wanted to clear his conscience.
The 51-year-old heavy-equipment operator calmly told a detective that he had molested and killed six children over two decades across Los Angeles County.
Edwards was arrested, pleaded guilty to three of the slayings and was sentenced to death. Before he was sent to San Quentin, he made an even more startling admission: He had actually killed 18 children. Detectives began to investigate the claim, but before they could get more information, Edwards hanged himself with a television cord in his cell on death row in 1972.
Thirty-five years later, detectives are taking a new look at Edwards, reopening four missing-child cases from nearly half a century ago that they believe are tied to him.
In the last six months, police have uncovered a letter Edwards wrote seemingly confessing to the killing of a Redondo Beach boy....