[AntiGuv]

This killer has to do more than "blend" into Laurel, MD. This killer has to do things like saunter into Fredericksburg unnoticed, shoot a man pumping gas 50 ft from a uniformed officer, and saunter right back out through the dragnet without drawing any attention while carrying an assault rifle.....

[4Freedom]

As long as they choose a route that doesn't take them near the local Dunkin Donuts, your average terrorists can saunter anywhere they like while still avoiding detection.

[savedbygrace]

This killer has to do things like saunter into Fredericksburg unnoticed, shoot a man pumping gas 50 ft from a uniformed officer,

It was 50 yards, and the officer was occupied at the time. But more to your point, Muslims and AQ types are not just Arabic-looking people.

and saunter right back out through the dragnet without drawing any attention while carrying an assault rifle.....

An assault rifle? Boy, are you on the wrong forum. ;-)

[El Gato]

while carrying an assault rifle.....

Possibly broken into two backpack size pieces, or just as likely they are using one of the single shot handguns chambered for .223. That would at least help to explain the lack of follow up shots on the two he didn't kill, too slow. Although truth be told, not THAT slow, unless he/they are using one of those where the breach has to be screwed off and on after each shot. Possible, as at least one of that style can be chambered for .223.

[SSN558]

"and saunter right back out through the dragnet without drawing any attention while carrying an assault rifle....."

The weapon is catched, "hidden" and then the shooter retreives it just prior to making the hit. After the shot the shooter runs a short distance and ditches the gun again. The gun is retrieved later or abandoned. If the gun gets found the shooter permanently disappears, they now have a case.