Its an old martial arts movie where a cop enlists prisoners to help fight gangs of men to track down a boss. One guy throws knives, another wears what looks like a hair necklace, and another is a thief. The main guy kind of resembles bruce lee. Each encounter reduces their guys until just the 4 fight the boss.

Isn't it one of those Jackie Chan movies?

To the best of my memory I don't think so.

IMDb: 10/10 CLASSIC OLD SKCHOOL KUNG FU MOVIES - a list by erolmehmet (http://www.imdb.com/list/H6eN7is8He4/)
Try this.
Do you remember any of the main characters?

Wasn't any main stream actors. That I know of. Like I said the main guy look kind of like bruce lee.

What year did it release.

No idea. I watched it when I was young and it looked old back then. Def pre 90s. 70s-80s