This is a fine example.
http://www.youtube.com/watch?v=m_mDt7RV5h0
Warning: This video contains american soldiers blatantly killing or attempting to kill Iraqi civilians, and loving every minute of it.
The incident starts over a sniper round hitting near their post. And so they open fire on a store front, and cars as they drive down the street, and civilians as they get out of their cars and try to run away.
Clearly every one and any one within range of thier M4 Carbines was the sniper who took the shot.