Diver describes searching the abandoned cars . One man , then 69 , went missing with family and friend in 1970 while in a 1953 Chevy . `` There are theories from A to Z , literally . Routine police training with sonar equipment leads to macabre discovery at lake shore . One car contains bones and skull ; a second car also has bones .
Diver describes searching the abandoned cars . One man , then 69 , went missing with family and friend in 1970 while in a 1953 Chevy . Routine police training with sonar equipment leads to macabre discovery at lake shore . One car contains bones and skull ; a second car also has bones .