Some are undoubtedly on a power trip, but most people who choose law enforcement as a career do so out of some sense of community service. That puts them on the ladder of humanity a rung above the apathetic masses. But it doesn't mean they're perfect, and when they use or abuse their positions of authority, they're even worse than criminals, because they've breached the public trust. Most criminals, after all, never claimed to be good guys. But David Farrall did. An agent working the organized-crime beat for the FBI office in Miami, the Coconut Creek resident spent his time on duty trying to clean up South Florida's dirty underbelly. On November 23 of last year, he did some soiling of his own, driving drunk late at night and speeding the wrong way down I-95, in the process killing two innocent Lauderhill brothers, Maurice Williams and Craig Chambers. As if that weren't bad enough, he identified himself as an FBI agent at the accident scene, and in doing so got investigators initially to believe his story -- that it was the brothers who had been at fault. Very, very bad.