The Trenton Police Department is a participating member of a number of special units that assist the other downriver law enforcement agencies as well as the general public. These units work in conjunction with other communities to help provide services that would otherwise be unavailable. Some of the units are listed below,
The Downriver Mutual Aid Task Force
Crash Investigation Team
Homeland Security Investigations (HSI)
Crisis Negotiation Team
S.W.A.T.
Downriver Dive Team