before dna was found, which is back in 1979. 1989, 10 years later. so that, nothing was put in the database at that time. gregg: right. >> now putting it in the database now may connect him to other murders that had been reported and were unsolved. it is not likely to identify some of the identified dead already found in his house. gregg: yeah. mary ellen, a lot of people always thought he was responsible for many more murders than those attributed to him. what say you? >> i would definitely agree with that and the reason say that is having interviewed a number of these serial killers and worked on hundreds of cereal murder cases we know there is a period of time before they get into kind of the groove, for lack of a better term. there are murders where they're practicing.