A Vadnais Heights woman was sentenced Friday to four years in prison for a hit-and-run crash that killed a 92-year-old motorcyclist last year.

Autumn B. Mason, 26, pleaded guilty in February in Ramsey County District Court to one count of criminal vehicular homicide.

Mason struck and killed lifelong St. Paul East Side resident Roy Kromschroeder with her Dodge Durango about 7:45 a.m. on Sept. 13.

According to the complaint: A witness said it appeared as if Mason and Kromschroeder arrived at the intersection of Prosperity and Ivy avenues at the same time. They each waited for the other to go first.

Kromschroeder began to ride through the intersection when Mason sped through at the same time as if she had become impatient, the witness told police. Mason was traveling east while Kromschroeder was traveling north through the four-way stop.

Another witness told police that Mason exited her vehicle to check on Kromschroeder before she drove away.

Kromschroeder’s helmet flew off in the crash. Mason’s front license plate was also dislodged. It was found on top of Kromschroeder’s motorcycle.

Kromschroeder raised his two sons and a daughter in the same East Side home he was born in on E. 6th Street. He served in the Coast Guard during World War II, and in 2013, participated in the Minnesota Honor Flight in which veterans are flown to the National World War II Memorial in Washington, D.C.

He retired in 1979 as a supervisor at the 3M plant on the East Side.