Trey Songz found himself in the middle of a physical altercation with a po*lice off*cer during the KC Chiefs' game, and fans who witnessed it say the c*p was way out of line.

We've obtained this video from Arrowhead Stadium Sunday, which -- at first -- shows Trey and the off*cer in a struggle. Trey connects a p*nch with the off*cer's head, and gets him in a he@dlock, but then the off*cer pins Trey to a seat.