police had their suspicions about sam lopez's involvement in the murder of his neighbor and former girlfriend, cathy torrez. but there was no physical evidence tying him to the murder. and he had a solid alibi on the night cathy was killed. sam was with his cousin, javier. which is why when police took their case to the d.a.'s office, the d.a. refused to file charges against sam. police pursued other leads too, like a possible connection to the suicide of cathy's boyfriend, albert. did you think that cathy's disappearance had anything to do with albert? >> no. >> reporter: coincidence. >> yeah, just two tragedies happening at the same time. >> reporter: but not connected. >> but not connected, no. >> reporter: even though that