In the meantime, a witness who saw the crash thought some good samaritans were stopping to help but they were criminals and ended up stealing his gun.
It happened on the south side at 98th and Halsted.
A horrific crash at a South Side intersection; three vehicles, five people injured, including a Chicago patrol officer who's been on the force 16 years.
"He looked real bad," said Lisa Newell, witness.
Lisa Newell said the injured officer was shaking and could not move when two men driving by stopped at the scene.
Police say the officer was responding to a call. Newell says the officer hit a car and then slammed into a pole. A mini-van was also involved.
Two teens and an elderly couple were injured.
At this point, investigators are studying evidence that may lead to the suspects who stole the officer's gun.
" We also have cell phone video we're looking at right now," said Roderick Drew, Chicago Police.
Meantime, city crews replaced the damaged pole on Wednesday night while police patrolled the community. And an 85-year-old driver involved in the accident has been cited for two traffic violations
Anyone with information should call the Chicago Police Department's Robbery Division at 312-747-8273.