why he had that, he said that so that he could drive down the road and look for the suspect and keep his eye on the composite at the same time to try to find someone that looked just like that. >> but someone did look just like that. doug desilva. desilva lived 100 miles away. but his ex-wife and daughter both lived in the same mobile home park as kay robinson. a year earlier, he was a suspect in the murder of a 16 year old girl at a nearby high school. police brought desilva in for questioning. in the middle of the interrogation, he did something very odd. he asked for a job application, because he said he wanted to become a state trooper. >> we thought maybe he might be taunting us at that point. we were very suspicious of that. >> police put together a photo heine up. and kay robinson identified