Attorney Nate Washington says Collie was shot in the back, leaving him paralyzed.
A police dashcam video appears to show a Texas officer shoot a black man as he's walking away from the officer and not posing any immediate threat.
A lawyer for David Collie released a copy of the video Tuesday showing the July encounter with a Fort Worth officer and a Tarrant County sheriff's deputy.
Attorney Nate Washington says Collie was shot in the back, leaving him paralyzed.
KXAS-TV reports that Fort Worth police said in a news release after the shooting that authorities were searching for two shirtless black men who had robbed a gas station.
Police said Collie pulled a box cutter from his pocket and pointed it at the deputy.
He was charged with aggravated assault but a grand jury declined to indict him.