help law enforcement. because they now had the perpetrator s dna profile, but back in the mid- 80s, that wasn t the help it would be today. back in 1984, they could at least do a type of blood testing, where they can determine whether or not an individual is a secreteer or a fawn secreteer, basically narrow it down to 20% of the population. roughly 80% of americans are secreters, meaning their bodily fluids contain markers for blood type. the other 20% non-secreters don t have those markers. the killer was a fawn secreter? correct. that meant it couldn t be lance, the ex-boyfriend. she said lance threatened her with a knife. blood tests revealed he was a secreteer. heed a anal by putting him 300
the boy next door in amarillo. the boy angie had trouble with. it was something angie s friend sheila knew all about. he was very obsessed with angie. he was so obsessed with her, he would come down all time to school to see her. reporter: they had dated through an just s freshman year. one night i got a call from angie. she was crying. she said that lance had gone crazy and i needed to get over there. she was screaming. lance had taken a knife and shredded all of her clothes. did he threaten her? yes. yes, he did. physically, verbally? verbally and you have a weapon, whether it s a knife, scissors, he threatened her. he was pretty scary guy. he s keepy. suddenly lance was at the top of the investigator s list. prime suspect. absolutely. especially when we have an 18 wound stabbing. there was no forced entry in.