Remember the shooting of Giuliana Sgrena? Seems that the US military account was right, and the Italians agree. Read the article linked above.
One problem, the time from warning shot to deadly force is related as "about four seconds" and the car traveled about 65 yards. If about four seconds means 3.5-4 seconds, that means the car's speed was 33-44 mph, not 50. But not the "slow" speed Sgrena claimed either.