families. it turned out cathy had dated armando's younger brother, sam, off and on. and the families lived right down the street from each other. you can see one house from the other. >> exactly. >> reporter: and she's going out with sam. >> uh-huh. >> reporter: you marry his older brother. >> uh-huh. >> reporter: so that house wasn't just another house on the street. >> right. >> reporter: it was family. >> right. right. >> reporter: police spoke with members of the lopez family. sam knew cathy the best. >> how long have you known cathy? >> jeez, i've known her for over five years. >> reporter: they interviewed him down at the station. >> yeah, i really had fun with her. like i said, that person, i'm serious, would always have a smile. we would always be laughing, making jokes. >> reporter: given their friendship, detectives were curious about what cathy might have shared with sam about albert. since albert tried to commit suicide, she was taking it pretty hard. was she confiding in you? >> the only thing she mentioned