Yes, he is IMO.
These men are supposed to be trained to handle a situation like this, and most departments issue a Discipline Handbook that details what's expected of them in these situations.
Here's Denver's:
http://www.denvergov.org/Safety/Home...7/Default.aspx
There was no need to punch that woman and that is where he made his mistake.
If he's slacked off and hasn't been training in hand-to-hand combat (as many officers do), then that is his fault.
Maybe instead of stuffing his face in an IHOP he should be training in a dojo.