You could help solve one of America's greatest cold case murder mysteries today.

Kristine was serial killer Christopher Wilder's youngest victim

Colleen was only 15-years-old when serial killer Christopher Wilder targeted her in her pink bikini

She Said No to His Marriage Proposal. Then He Started Killing—And Came Back for Her. Some men accept rejection and move on. Serial Killer Christopher Wilder waited a year, murdered other women, then returned for the one who'd dared to say no. Beth Kenyon had everything to live for. At 23, she was a beloved elementary school teacher who lit up classrooms with her warmth. A part-time model and cheerleading coach whose beauty turned heads the moment she entered a room. An adored

The Last Photograph: Moments Before Beauty Became Her Death Sentence An off-duty firefighter captured her smile. Moments later, a serial killer stole her future. Model and beauty queen Rosario Gonzalez vanished into thin air in front of 200,000 spectators at the Miami Grand Prix. She was last seen walking with serial killer Christopher Wilder.