geovany must of killed her. roberts put in this guy joe, who initially wouldn't even give his full name. and who was this geovany anyway? the detective checked for priors. there wasn't much. >> had a record as a juvenile. his fingerprints that we lifted from the crime scene. there is hardly any any that were. legible >> and none was a match. >> now you're stuck as an investigator. this is all you got, and you've got this one witness and you want to tie the to suspect to the scene. but there's nothing to time. i mean, nothing. i had nothing to hit him on. >> but worth a try. they brought geovany in for an interview. >> water? >> no. >> of course, he denies it. >> i'm real comfortable thinking that you're responsible for this murder. >> that's crazy, sir. >> was it crazy? no way to prove really. and then a couple of days later, detective roberts brought the tipster, joe, back in. this time joe poured it all out. said geovany actually told him straight out that he killed someone. >> i just was a shock when he told