Murderer Weapon News Today

Home invasion gone wrong. her bmw was missing. there was no sign of the murderer weapon. but detectives did recover two .38 caliber slugs and something else caught detecti detectives attention. >> on the inside of her left arm, there was a bite mark. a crime scene analyst swabbed the mark for saliva that could belong to the killer. >> reporter: dna of whoever bit sherry. this was before dna testing technology would arrive, that could link a suspect to a sample like this one. back then, the dna w...