Tucker is a police Sergeant in Milwaukee, Wisconsin.
He is first seen when Lieutenant Robarts greeted him and asked about the situation, Tucker told him that a guy locked himself in the bank. Robarts then gave the order to cut off the power.
Later when Robarts is on the phone with Sam, Tucker in the back is listening. Tucker later received information that one of the hostages took over the situation.
Soon after, to the bank arrives the FBI and Tucker listened to Agent Henriksen when he spoke with Lieutenant Robarts. Tucker is also seen in the background when Agent Henriksen is talking on the phone with Dean.