It's the "He's gone" incident.
There are two videos linked on this thread. The Reuters video shows nothing but the gun fight then one of our guys shooting down an alley and saying "He's done".
The other video has more footage of the same incident:
http://www.informationclearinghouse.info/video1043.htm
There's the gunfight and interview of our soldier. At around 1:20 in one of our guys says "he's wounded in between these two houses". After this is the part where our guy shoots down the alley and says, "He's done".
I fail to see the outrage from this.