maybe because the investigation of cassy farrington's murder had been going nowhere for so long, even the family kept trying to tell the detective, sanchez, that a particular silver city cop killed cassy. but the detective hadn't done a thing about it. >> reporter: he never questioned him? >> huh-uh, and i asked him that. and he said he was trying to eliminate everyone else that could be possibly a suspect, and then he was gonna talk to him. >> reporter: but sanchez's supervisor, lieutenant tavizon had already confirmed billy lee's alibi. boyfriend david's too. >> we know he was at work, he left at 5:00 in the morning to go to work in demning, and all that was verified. >> reporter: and still nothing happened. so one day months after the murder, the anger cassy's family was feeling boiled over. >> i called the d.a.'s office, asked for a meeting to complain about the sheriff's department. >> reporter: and complain he did. forcefully, said chief deputy district attorney george zsoka. >> people got a little hot under the collar, the sheriff, the undersheriff were there. and lieutenant ta