The parents needed help for a child who appeared to be having a seizure, St. Paul police said.
The mayor came to the aid Friday night of a West Side family whose infant appeared to be having a seizure, said St. Paul police Cmdr. Doug Holtz.
About 7:20 p.m., crews were sent to the 500 block of Ohio Street on a report of a woman screaming, possibly because she was being assaulted.
But when they got there, all they found was a car in the middle of the street.
Dispatchers sent a message to police that the car was there because Coleman had taken two parents and their child to United Hospital.
Coleman "happened to be driving around in the area," which is near his home, Holtz said. He thought that they were having trouble because of the medical emergency.
The condition of the child, who Holtz said was younger than a year old, was not available Friday night.
Police later brought the car to the parents, Holtz said.