A murderer thought he could cover his tracks by setting fire to the crime scene, but in doing so, he provided the forensic evidence needed to convict him; a new forensic tool used to examine the kindling proved to be his undoing.
A Russian immigrant stockbroker is found dead and a strange phone call to his office is the only clue investigators have to go on - until they're led to a client who's made some bad investments, and a dog that sheds a little more than his owner realized.
A car is discovered in a drainage ditch with two bullet-riddled bodies inside, and a fingerprint from a latex glove provides key evidence investigators need to determine where the crime took place as well as the identity of the killer.
The investigation into the murder of a World War II veteran is impeded when detectives' prime suspect provides a solid alibi, but forensic scientists are able to make a key discovery due to the killer's preference for a distinctive style of footwear.
A woman suffering from depression apparently took her own life. But her sister told police, that a year before her death, she said if anything were to happen to her, there was a note in the china cabinet. Investigators found the note and the killer.
The case of a decomposed body found in an irrigation canal goes unsolved until shoe prints left by the careless criminal while dumping the body of his second victim give authorities the evidence they need.