brutally raped in those crime scenes, sleep better tonight. he isn't coming through the window. he is now in jail and he is history. >> reporter: police are not saying what led them to deange deangelo's dna. police staked out his home and got him as he was leaving the house. he seemed very surprised by the apprehension. deangelo was a police officer for two agencies in the area. he was fired from the last department for shoplifting in 1985. how he was able to elude authorities for so long and whether his background played a role, we do not know. authorities knew they were looking for a needle in a haystack. they knew it was there. dave and christine. >> dan simon, thank you. cdc reporting 30 new cases of e. coli linked to lettuce