Silent Footsteps
Double Indemnity (1944) was based on an actual murder case from 1927. Ruth Snyder took out a large insurance policy on her husband, and then killed him with the help of her boyfriend. The policy had an unusual double indemnity clause.
According to Wikipedia, “Judd Gray, the man on whom MacMurray’s Neff character was loosely based, said when he confessed, after killing Albert Snyder, ‘When I walked I listened for my step — no sound seemed to follow.’ Neff says, ‘I couldn’t hear my footsteps. It was the walk of a dead man.'”
Trivia