Video shows suspect in Cambridge shooting on Memorial Drive firing gun

Video taken by a witness from the Cambridge shooting shows a man firing and waving a gun while walking along Memorial Drive Monday afternoon. 

The video recorded from a nearby apartment building near the intersection of River Street shows at least one car driving by as the man walks down the middle of the street, apparently yelling while raising the gun over his head and then firing a shot. He is also seen hitting a stationary SUV with the gun.

The gunman has been identified as Tyler Brown. He was shot and wounded by a responding State Police trooper and a civilian. Two men in separate cars were shot and have life threatening injuries. 

Witnesses say the gunman appeared to be shooting passing cars at random. Middlesex District Attorney Marian Ryan said 50-60 rounds were fired and at least a dozen vehicles were hit. 

"I ran through the bushes and fell in here, and ran all the way down the street," said one witness, who told WBZ-TV she heard at least 15 or more gunshots, "I was running for my life."

Ryan said people scattered as the gunman opened fire, and some hid under their cars. 

One driver said he had to stop and crouched down before the gunman hit his radiator. Another person said the headlight of their car was hit.

Authorities say there is no ongoing danger to the public, but the area was shut down to traffic Monday afternoon and people are urged to avoid the area.