The accident happened on the South Side early Friday morning at 8100 South Ashland.
"Everybody cannot believe it," said Terrence Booker, victim's father.
They say they thought their son was asleep in his bedroom. Instead, 13-year-old Trenton Booker snuck out of his house and headed off on his bicycle.
He got less than a mile before a driver hit him and sped off.
A bent-up bike is a testament to a life lost.
"I think for you to hit someone and try to keep going, I think you are a dirty dog. That's dirty," said Booker.
"To hit a child, somebody's child, and keep going. What kind of person are you?" said Aletha Coaks, victim's stepmother.
Witnesses to the hit-and-run reportedly chased the driver.
Police caught-up to the car a dozen blocks later. The Dodge Charger has front-end damage. More significantly, its owner: a 39-year-old Chicago Police Officer who was off-duty at the time.
A police spokesperson released a statement saying "An internal investigation in this matter will be conducted... The officer has been relieved of his police powers. The department extends their deepest sympathy and condolences to the family of the victim."
No one came to the door at the officer's home on Friday night. But the 8th grader's relatives tell ABC 7 the fact that a police officer is suspected of driving the car that killed Trenton is less important than remembering his warm smile and friendly nature.
"He disobeyed his parents as kids do. He was just in the wrong place at the wrong time and unfortunately it cost him his life," said Coaks.