The film involves an FBI investigation of possible vigilante cops. A bunch of slime are being killed on the streets in what appears to be military-style executions. The opening scene shows exactly what I mean, as a drug-lord/pornographer and his gang are wiped out by a group of MP5-toting paramilitaries, who turn out to be SWAT cops.
The acting is excellent, and the action sequences are top-notch. I can't believe this wasn't released for the theatres. It would have probably done well. Michael Rooker and several other fairly well-known actors make up an excellent cast.
I purchased the DVD when it was available, but alas, is now out of print. If it becomes available, I would suggest that anyone get a copy, you won't be disappointed.