Gunman killed wrong kid, police sources say.

The killer stood over 13-year-old Robert Freeman’s bleeding body and pulled the trigger again, again and again.

But though he was just feet from the 8th grader’s face on the Far South Side Wednesday night, the gunman got the wrong kid, police sources said.

Bloodstained pavement and a makeshift memorial of teddy bears Thursday morning marked the spot on the 11500 block of South Perry where the latest Chicago schoolboy murder victim fell, in an apparent case of mistaken identity.

“The doctor told me he found 22 bullet holes in my baby. Twenty-two,” said his devastated mother, Theresa Lumpkin, who ran from her home moments after the shooting to find Robert dying in the street outside.

“That’s too many to...give a 13-year-old child,” she told ABC7. “You’re not supposed to kill a baby, not a kid. Period.”

Dozens of youths were hanging out in the street at 8 p.m. Wednesday when the killers snuck through a thicket of overgrown weeds in an empty lot and opened fire, relatives said.

Robert, who moved to West Pullman a few months earlier, had quickly established himself as a friendly face on the block, mowing lawns for pocket money and riding his bicycle with an infectious smile, neighbors said.

He attended Oglesby Elementary School, but when his family moved he transferred him out of the Chicago school system in May.

Wednesday night wasn’t his first brush with trouble, a police source said. Earlier this summer he was arrested for allegedly throwing bricks at car windows.

But Lumpkin said she told her son all the time to stay out of trouble. And she said he always told her, “ ‘Momma, I ain’t like that.’ ”

“He loved fishing, and he was always begging me to send him to his grandma’s in Saginaw, Michigan, so he could go fish there,” she said. “I wish I’d listened to him. . . . He might still be alive.”

Lumpkin said Robert was still conscious when she rushed out to him Wednesday night.

“He was saying, ‘Go get my momma,’ ” she said. “I’m hurt — it hurts real bad.”

Detectives spent Thursday interviewing witnesses but had no suspects in custody. They appealed for the public’s help.

The neighborhood has been plagued by crime. In the past two years, there have been two other killings within a block of where Robert was killed. In July alone, there were two armed robberies with a handgun and six batteries within a block, police records show, while 16-year-old Jeremiah Sterling was shot dead in a gang dispute a mile away on July 15.

Elonda Jackson, whose 15-year-old nephew Percy Rounds was gunned down in an unsolved July 2008 killing less than 100 yards from Wednesday’s murder scene, said, “what can you do when there are all these random killings?”

“It grips you to the depths of your soul.... You just want to know why, but we still don’t.”

And Riccardo Pittman, whose niece Elaine Brown was shot in the face in 2008 a block from where Robert was killed, and whose daughter, Leslie Brown, was strangled to death a half mile away, police say, by alleged serial killer Michael Johnson, added “The killing is totally senseless out here. It never stops.”

Neighbor Cola Townsend, 80, said that after he heard the gunshots Wednesday, he looked outside and saw “the boy was lying there in the street and 10 little kids in white T-shirts were running away as the cops arrived, like they always do.

“I’ve lived on this block 35 years, and it’s never been this bad.”