cops in another jurisdiction, roseville, some 13 miles south where francesca lived and where matt had last been seen. did you get the feeling you were being brushed off? yes. reporter: it was a nuisance case? yes. and he was like wait in the lobby. reporter: was the family frustrated? i think they were frustrated. reporter: but chesterfield detective scott blackwell was struck by doreen landry s unshakable belief in her son s integrity. i said the right person will be taking care of this. it will be taken care of. we re not going to leave you hanging. reporter: detective blackwell was especially interested to read doreen s printout of the suspicious atm withdrawals from matt s account. he said the first thing he s going to do is let s find out if this was matthew who did these withdrawals. reporter: so the detective, hoping to find an answer on the security cam video, went down to the sunoco in the crime-ridden streets and caught a break. i went to sam s club, and
went missing, had bought a new security camera system. the security cam he was replacing had a blind spot in the back where his atm dispenser was. moses opened the carton and set to installing his new video security system. it was the weekend. his son said, forget it, let s wait. i said, no, we re not going home until we hook it up. reporter: and on the security cam video, detective blackwell was seeing something that filled him with dread. someone else is using his card at that point. that s correct. and it s obvious foul play. the news didn t surprise me. for some reason i was hoping it was matt. reporter: meanwhile, on that tuesday, back north in the near suburbs, matt s friends and family fanned out through the county, putting up flyers with matt s face. they checked autozone stores. maybe he had stopped by one of them for his broken car alarm. francesca was searching, too. checking out dumpsters. and i m like, i can t believe