The men later spoke to CNN about what they saw. One worker said he heard two gunshots about 30 seconds apart:
"The cop didn't say get on the ground. He just kept shooting," the man said.
That same witness described the gruesome scene, saying he saw Brown's "brains come out of his head," again stating, "his hands were up."
The other contractor told CNN he saw Brown running away from a police car.
Brown "put his hands up," the construction worker said, and "the officer was chasing him."
The contractor says he saw Wilson fire a shot at Brown while his back was turned.
The two men in the video spoke under the condition of anonymity to CNN. It is not clear if they are the same construction workers who spoke to St. Louis' Fox 2 and the St. Louis Post Dispatch.
“I saw him staggering and running and when he finally caught himself he threw his hands up and started screaming OK OK OK OK OK and then the three officers come through the thing and the one just started shooting," one man told Fox 2 last month.
A friend of Brown's, Dorian Johnson, has also come forward as a witness. Speaking to KSDK in St. Louis last month, Johnson said Brown had not reached for Wilson's weapon.
"It was definitely like being shot like an animal," Johnson said.
Federal investigators stepped in to help probe Brown's death after protests erupted in the St. Louis suburb following the August 9 shooting. The Justice Department is also investigating the conduct of Ferguson's police as well as the county police force.
source: huffingtonpost.com By Mollie Reilly