(Robert "Twitch" Twitchell)
Hometown: West Roxbury, Mass.
Unit: Gang (Day)
Years on Force: 26
Legacy: Son is a state trooper; uncle was an FBI agent and two brothers-in-law and three cousins are police officers.
On a unit filled with up-and-coming cops, Robert "Twitch" Twitchell is an old school presence: a 26-year veteran of the department who will be the first to tell you how much he loves working with younger guys. Twitch actually insists he learns more from them than vice versa - though the rest of the unit would argue otherwise. In any event, with his promotion to sergeant, all those years in the line of fire have paid off. One of several people in his family in law enforcement, Twitch enjoys hunting and fishing in his time off.