Mercer County's S.E.R.T. was formed in August of 1990 with seven members who were trained by the New Jersey State Police. All team members are required to attend a formal Special Tactical and Weapons School. The team is equipped and trained to handle almost any type of situation that can occur in the Courthouse or at the Mercer County Airport.

The responsibilities of the Team are Hostage situations in the Courthouse, High Risk Trials, High Risk Transportation and High Risk Warrant service and VIP Protection. Some members of the team are trained as designated marksmen and hostage negotiators.

The S.E.R.T. Firearms Training Program consists of sidearm re-qualifications every two months. All members must qualify "Expert". They must also qualify with long guns, shotguns and rifles.