Follow-up To Cop Punching Teenage Girl

Chris over at Martial Development asked for specific techniques the Officer in the previous post could have used to maintain control over the teenage girl he was trying to give a jaywalking ticket to. The Cop lost control and hit one of the girls in the face, and generally blew the whole scene into a major fiasco.
Here's the video again:

This is a supposedly "trained" officer dealing with two teenage girls one at a time.
I'm sorry, but I contend that this Cop is miserably under trained. There is a failure in public relations, communication, and he resorts to punching the girl. He is so ill-prepared that if it was a more serious time and place, he could have been rushed by the crowd and disarmed.
Now, I know that no amount of restraint would have looked nice, but efficient grappling would have been so much more professional. Chris from Martial Development requested alternative techniques. I don't have time to stage an elaborate reenactment of the scene with the Cop, but here's a couple of examples.
These are merely demos, but any single technique can be used to restrain, provide pain compliance, and in many cases leave one hand free to operate a radio and call for back-up or whatever:

Or in this case, not using the striking but concentrate on locking the elbow/shoulder, something the Cop had many opportunities to achieve:

Now, neither of these drills replicate the attempted arrest scene, but I submit them as more efficient ways for the police to deal with mild resistance without resorting to hitting a teenage girl in the face.