Charges say a 20-year-old Mounds View woman was driving drunk and without a valid license Sunday night when she blew through a Coon Rapids stoplight in a pickup and crashed into a couple’s SUV, killing a woman who was five months pregnant.

A preliminary breath test at the scene showed Makayla April Sua Richardson had a blood-alcohol concentration more than twice the legal limit to drive, the charges say.

State motor vehicle records show Richardson has had an instruction permit since January, but not a license to drive. She was in the pickup alone.

Authorities on Tuesday identified the woman killed as 26-year-old Melinda Thao and the driver as Christopher Yang, 27, both of Coon Rapids. Family members said on social media that they were married.

According to the criminal complaint filed Tuesday in Anoka County District Court:

Police were dispatched to the crash at the intersection of Coon Rapids Boulevard and Springbrook Drive just before 9:30 p.m. Sunday and found Thao injured in the front seat of a Toyota Highlander and Yang injured behind the wheel.

Officers learned that the couple was turning left onto Springbrook Drive on a green arrow when Richardson, who was headed west on Coon Rapids Boulevard in a Ford Super Duty F-350 with a trailer behind, plowed into them. Witnesses confirmed the couple had a green arrow and that Richardson went through the intersection against a red light.

Richardson admitted to having drunk alcohol before driving, telling officers she had one drink.

She also acknowledged driving above the posted speed limit and not having a valid driver’s license.

An empty can of an alcoholic beverage was found inside the truck. She submitted to field-sobriety tests, which she failed, and blew a 0.18 BAC on a preliminary breath test. The legal limit to drive in Minnesota is 0.08. A warrant was executed, taking a sample of her blood; results are pending.

Thao was pronounced dead at a hospital, as was the child. Yang suffered broken ribs.

Richardson has been charged with one count each of criminal vehicular homicide while under the influence of alcohol and DWI, and two counts of criminal vehicular operation while under the influence of alcohol.

She had a first court appearance on the charges Tuesday and remains jailed in lieu of $100,000 bail. She’s scheduled to return to court on Sept. 12.

Talia McWright contributed to this report.