i could hear the desperation in franc cano voice.ation just kind of sent a hair on the back of my neck and i said, no, i'm not waiting anymore. they're gonna run. they're gonna run. keith morrison: time to move fast. they caught up to franc cano as he was boarding a bus. and steven gordon, they found him where he worked, an auto body shop next door to hardy windows. but-- he made a run for it. ran out the door. on a bicycle, yes. he had a little collision with one of our surveillance units and a little flying over the handlebars. and he was taken into custody. both men were charged with four counts each of first degree murder and forcible rape. hi, steven. hi. keith morrison: and detective trapp prepared to confront a suspected serial killer. andrea canning: coming up. i knew this was gonna be a lot different than any other interview i had done. andrea canning: take out with a killer. it is spicy. i told you-- i told you to be careful. andrea canning: when "dateline" continues. (♪♪) a single touch can say a thousand words. it says...