Snakes+RY

Summary
At the beginning of the episode, a woman's head is found inside a post office box. A child reports the murder, and the investigators come to examine the scene. The investigators are eventually lead to a hispanic club where a certain band performs. The band's lyrics match exactly what occurred at the crime scene: a snake was shoved down the victim's throat, and she was beheaded. The investigators suspected the singer of the band at first because the victim was an undercover reporter who dated the singer. His name was eventually cleared, however. The tread marks on the victim did not match those present on the singer's truck. Consequently, the investigators had to begin testing suspects anew. One night, the investigators searched the parking lot outside, and matched the tread found on the victim with a truck that was in the parking lot. The investigators went inside the hotel, and proceeded to arrest the murderer of the reporter.

Relevance to DNA Expert
DNA was taken from the victim's blood to identify her. Additionally, DNA identifcation revealed the identity of the killer of the man in the van; it was the man in the wheelchair. He was pretending to be handicapped, and shot the salesman because he was continually selling overpriced items to the man's wife. After murdering the salesman, the old man abandoned the wheelchair and left the scene.