Dateline on ID

College student Heidi Allen vanishes from the convenience store where she works; Gary Thibodeau is convicted of Heidi's murder, but now another man has allegedly confessed to friends that he killed the young woman, blowing the case wide open.

Intelligent, hard-working beauty Kathryn Laird lives life to the fullest, then her body is found in a river, and investigators must determine whether she took her own life or was the victim of foul play.

A case makes headlines when the defendant argues he was too obese to have committed murder.