PIERRE, S.D.—State authorities are investigating after officials allegedly found a dead woman’s body in a vehicle following a high-speed chase in South Dakota.

Attorney General Marty Jackley’s office said Tuesday a 30-year-old California man, Tosten David Walsh Lommen, has been arrested on several charges.

Authorities say a Highway Patrol trooper on Monday observed the suspect driving over 100 mph on I-90 in western South Dakota. Officials say the trooper attempted to pull the driver over, but the suspect didn’t stop.

Law enforcement says the pursuit continued from Spearfish to Rapid City, about 50 miles, reaching speeds of about 118 mph, before authorities put down stop spikes to disable the vehicle.

Officials say the suspect attempted to flee on foot before getting caught. The body was allegedly found during a search of the vehicle.