Strange Mysterious Small Creature caught on Camera News

I saw this video News Oklahoma's Channel 4 News! A women shot and killed by U.S. Marshals doing chase. A police officer by back of police SUV. You can see a strange small mysterious creature on the floor next to police feet. It moves by rolling around. Next clip you can see it again rolling it looks like it vanishes by sidewalk? I did a close up. It does not looks like a small rodent or bird.
What is it?
Anyone seen this before?
Leave a comment if you know what is this thing?