Charles & Jennifer Chia (Jack of Diamonds, Nevada)

Charles and Jennifer Chia could see their apartment complex from their school bus stop – that’s how close to their building it was. Such a small distance for something to go so terribly wrong. But a couple hundred feet is all it took for someone to stop the Chia siblings from making it home safely. That person has gone undetected for more than 34 years. But present-day detectives say their days are now numbered, as new technology could soon expose this nameless predator.