A Wisconsin State Patrol trooper was killed in a rollover crash Tuesday morning in Sauk County.
The accident happened on east Interstate 90 near mile marker 89 at 4:30 a.m.
The on-duty trooper, Anthony Borostowski of Tomah, was headed east on I-90-94 when he lost control of the car, entered the ditch and hit a tree, according to WISC.
The trooper was pronounced dead at the scene.
Borostowski was a trooper and a staff sergeant in the Wisconsin National Guard.
Five miles of the highway was closed for several hours Tuesday morning.
The investigation into the crash is ongoing.