It looks like a Belgian Malinois. A lot of security companies are using them instead of Sheperds now. They are smaller, more compact, and even though they are about 40 to 60 Lbs, they can take down much bigger than them. When I was training with a gentleman, a certain police office (220lbs 6' 4") laughed and said the Malinois could never take him down. We sent him out in the arm, and he was stunned at the impact these dogs could have. He was on the ground in a matter of seconds. They instinctively know where to hit you.
there's a saying - Malinois, faster than a speeding shepherd.
Here's more video:
i love that first little bit with the mali dragging the guy out of the van.
But I've found them to be very loving, especially with my basenjis and really no home should be without one.