Detroit police have charged a 12-year-old boy in a mugging caught on camera after he was turned in by his mother who saw the video, WXYZ-TV reported Friday.

“He was involved,” she told the station. “It’s something I had to do.”

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The victim was a disabled man eating alone in a restaurant on Detroit’s west side over the weekend.

Police also have arrested a 20-year-old man and a 13-year-old boy in connection with the crime.

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“He was crying to me, he’s sorry mommy, he didn’t mean it, he didn’t know what happened, it happened so fast,” the woman told the station. She was identified only by her first name and her face was not shown on camera.

The victim says he gave each of them a dollar. The older one then tried to snatch his wallet.

Police said the man got into a struggle with the three suspects.

“I want him to learn a lesson for this,” the woman told the station. “I want him to be able to put this behind him and let him know this will never happen again.”

Police released the surveillance video of the mugging Wednesday.

The woman said a friend told her that she had to see the video because her son, a 7th grader, was in it.

She turned him in to police Thursday.