Ideas for a Law Enforcement Themed Birthday Party

My sisters birthday last year was themed Las Vegas. Five of us went as the CSI Forensic team.
The most costly items were the Black T shirts (3 for $10 @ Walmart) other than that we got everything else from the local $ store.

Iron on letters for the T shirts (Name on Front Dept on Back)
Sheriff Kits (gun, badge, handcuffs)
Flashlights
Magnifying glass
Black baseball caps (Plain black)
Latex gloves
Black belts
Dusting kits (Ziplock bags containing a makeup brush, the magnifying glass & a plastic film container with talcum powder in it)

We looked fantastic, and were the hit of the party, questioning guests, and dusting for prints! Have fun

For a really funny party: What about a donut party at a local donut shop? I have a family member that is a Deputy and we did this. It was so funny.

One of the games could be to shoot bottles off a stand with a super-soacker (large squirt gun) from quite a distance. This would be fun this time of the year.