have help. >> reporter: prosecutors had a hard time believing esteban was physically capable of killing michelle le all by herself. >> we encouraged them to make sure they eliminated any possible suspects, such as the father of giselle's child. >> reporter: that would be scott the ex-boyfriend, butch is referring to. and so everybody's antennae went up in late july, 63 days after michelle's disappearance, as the le family searched the hills for her. detective ritchie got a very strange phone call from scott, who sounded out of breath. >> saying that he believed that he had found michelle's phone. i asked him, "where did you find michelle's phone?" in the back seat of his car. >> coming up, at first police doubt scott's story. >> had we missed something? is he the other part of this?