[CobaltBlue]

You're probably right that it's more than one guy. Could be two men, or one man and one woman.

[johnny7]

When you fire a weapon... rifle or side-arm, it takes a little time. To do well, it takes a little longer.

Hitting targets from the distance this a-hole did takes a knowledge of the area and the best field of fire.

He/she had to get out quick!

Then again... the shooter might have had a silencer and smokeless ammo... with a group of people helping him.

One thing is certain. The dude will kill again until the cows come home.

The police are just well-paid people walking around.

Good news! Chief Ramsay is on the case!

[Semaphore Heathcliffe]

Could be two men, or one man and one woman.

Excellent point. A woman driver in a minivan would the most innocuous presentation possible, IMO.