OLATHE, Kan. (AP) — A man who admitted causing a Kansas traffic crash that killed a pregnant woman has been ordered to spend more than 12 years in prison.

Twenty-one-year-old Raphael Sherman of Shawnee was sentenced Monday in Johnson County. He pleaded guilty in August to charges of second-degree murder and aggravated battery.

Authorities allege that Sherman ran a red light in January after a police officer tried to pull him over for a traffic offense. That’s when authorities say his car hit a vehicle occupied by 25-year-old Denise Lopez, who was 39 weeks pregnant. Sherman’s car also struck a minivan, injuring several of its occupants.

Lopez died at a hospital, where doctors managed to deliver her baby.