Time warp: When was Maria taken?

The time of Maria Ridulph's kidnapping is disputed – and has been almost since the day she disappeared. Did it occur at about 7 p.m. on December 3, 1957? Or was she snatched earlier – before 6:20 p.m.?

Every minute matters – even half a century later.

If she was kidnapped at about 7 p.m., the man convicted in the cold case has what he calls an "ironclad alibi."

If she was taken before 6:20 p.m., investigators say, the alibi falls apart.