Do You Know What the Cat in the Kitty Litter Was?

Two years before bob's death, clinkhart had persuaded bob to allow him to secretly record a telephone conversation between the two brothers. The recorded conversation took place nearly a year after bethany disappeared. By then, mike knew his brother had spoken with police and was clearly suspicious. Bob kept pressing him to talk about what happened. And though reluctant, mike shared enough information to implicate himself in bethany’s death. But was the recording bob's only legacy enough to convict?