Newly released body camera footage shows a police officer on horseback leading a black man down a street by a rope.

“This is going to look really bad,” one of the officers is heard saying in the video, released on Wednesday.

The clip shows the arrest on 3 August, when Donald Neely — a man who family lawyers have said suffers from mental illness and regularly sleeps on the streets of Galveston — was arrested on trespassing charges.

The incident sparked outrage, after images were shared widely online. In those pictures, the officers can be seen leading Mr Neely with a rope, and on horseback.

While neither officer faced criminal charges, the new video provides yet another glimpse into the series of events. Both officers were placed on “modified duty” following the incident.

Henry Louis Gates Jr: Every black man's nightmare Show all 2 1 /2 Henry Louis Gates Jr: Every black man's nightmare Henry Louis Gates Jr: Every black man's nightmare Class resentment could have been as much a factor as race prejudice in Gates's arrest on 16 July, for disorderly conduct, on the front porch of his apartment house near Harvard, by a young white police officer, Sgt James Crowley. AP Henry Louis Gates Jr: Every black man's nightmare Class resentment could have been as much a factor as race prejudice in Gates's arrest on 16 July, for disorderly conduct, on the front porch of his apartment house near Harvard, by a young white police officer, Sgt James Crowley. AP

At one point in the video, officer Amanda Smith, who can be seen leading Mr Neely with a blue nylon rope, tells the man to “stop” at an intersection, adding: “stay next to me, because I’m gonna drag you if not.”

Her patrol partner, Patrick Brosch, raises concerns at two points during the video.

“This is going to look really bad,” he says, according to the video.

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At one point, Mr Neely says he is not embarrassed, prompting Mr Brosch to say: “I’m glad you’re not embarrassed, Mr Neely.”

Community activists and lawyers for Neely’s family have demanded decisive action to prevent a repeat of police conduct they said was an insult to the dignity of all African-Americans.

“When they dragged Donald Neely down that road by horses and rope, it was like they were dragging our entire community down the road,” Ben Crump, president of the National Civil Rights Trial Lawyers Association, said in an appearance with other supporters in August.