Cops busted one of the brutes accused of savagely beating a disabled man who offered to help pay for a meal at a Brooklyn chicken joint, police said Friday.

Kariem Roberts, 21, turned himself in Thursday and was charged with robbery, gang assault and menacing in connection with the March 1 attack on Joseph Molohon, according to police.

The 37-year-old victim was in a Texas Chicken & Burgers at Ocean and Church avenues in Flatbush at about 7:30 p.m. when he kindly offered to cover the cost of a meal for two other patrons who appeared short on cash.

But instead of taking the money, the men went “ballistic” — yelling at Molohon and pummeling him with punches and kicks, he said.

As the assault unfolded, one of the men allegedly asked him, “Why are you talking to me?” before swiping his cane and beating him over the head with it.

“The next thing I knew I was on the floor,” he told The Post on Wednesday.

Molohon, who suffers from multiple sclerosis and HIV, was additionally targeted by two more men who ran inside the Flatbush fried-chicken restaurant and jumped into the melee.

After his attackers fled, a fifth man entered the eatery and emptied the victim’s front pockets before taking off, according to police.

His money was not taken, though.

Molohon, who claimed to be carrying $1,000 that night, was later treated at an area hospital for a gash on the head, a fractured left cheekbone and multiple contusions.

Police are still seeking the other four suspects seen in the shocking surveillance footage.

The tape shows customers standing by and doing nothing as a frail Molohon lay motionless. He told The Post that he will be in fear for his life until the other suspects are put behind bars.

“It was really nasty what they did to me,” he said. “They didn’t have to do anything of that nature to me.”