Just after 10:30 p.m. Sunday, police responded to a call about a reckless driver on the road.
Someone saw the driver swerving and driving at various speeds," said Sgt. Eric Relich of the Mount Pleasant Police Department.
An officer spotted the vehicle driving roughly 25 miles an hour over the speed limit.
The car stopped near the Hometown gas station at 24th and Racine Street. Sgt. Relich said that is where police made contact with the teen behind the wheel.
"There was a male driver, later identified as a 15-year-old," Relich said.
Police found alcohol, two other intoxicated teens and a baby boy in the back seat.
"A 5-month-old infant who was being cared for by these three intoxicated individuals," Relich said.
Prosecutors say beer bottles were found next to the child's car seat.
"It was a very dangerous situation. But it ended up turning out OK as far as people's safety," Relich said.
The teen driver was taken into custody.
Police say there is a lesson to be learned from the unfortunate event.
"It's very important not to drink it drive. It's going to require parents to pay close attention to their children," Relich said.
The 15-year-old driver was released to his parents. The 5-month-old baby is safe with family members. At last check, the child's mother is being held in the Racine County Jail.