Cold case heats up in Pennsylvania crime lab
Janet Walsh was just 23 years old when she was found murdered in her Monaca, Pa., home in 1979. Back then, investigators were eyeing five suspects, but couldn't make an arrest. In 2010, time and technology catch up with the case. For more, watch "Janet's Secret," Saturday, Dec. 31 at 10 p.m. ET/PT on CBS.