Las Vegas cop subdues perp with his Jiu Jitsu skills

Check out this average sized cop put his Jiu Jitsu skills to use as he subdues a larger guy who tries to bolt. Crouching perp, hidden cop? In all fairness, he did have to taze the heck out of the guy at the end. Either way, it looks like justice prevails. Or do you think he went too far?