the only real enemy he had was sid dorsey. but it didn't make sense that dorsey would have been behind it because dorsey didn't have anything to gain. he had already lost the election. >> i sympathize in saying that with the -- his family, with the law enforcement community which i'm a member of, you get the same feeling when you lose a brother in blue, be it that he was a political adversary or not. >> derwin's own family was mystified. >> do you have any idea who did this? >> no. >> any suspects in your mind? >> no. ♪ >> more than 4,000 people attended derwin brown's funeral. brown's wife and five children watched as hundreds of officers passed by the flag-draped coffin. michael brown is the son who saw his father in the driveway the moment before he died. >> because i know he's watching and i know he can hear me. and i love you, dad. >> do you swear or affirm -- >> on january 1st, 2001, thomas brown, no relation to derwin, was sworn in as interim sheriff. and prosecutors began to interview hundreds of people. >> anyone who w