The man who was shot and killed by police following an hours-long standoff on I-5 has been identified as Alexander Costin, 32, of Nanaimo, British Columbia.

He was identified by the Thurston County coroner on Tuesday.

The four-hour-long standoff began on Nov. 18 after Costin reportedly crashed a semi-truck on I-5 in Thurston County.

Washington State Police said they received calls of a man running into traffic on I-5 and that he was causing traffic to come to a stop and attempting to open multiple car doors.

He then reportedly assaulted and forced the driver of a semi-truck out while taking control of the vehicle. The man drove the carjacked semi-truck into other vehicles eventually rolling the truck in the median, according to WSP.

A negotiator, an armored vehicle, and other local agencies were called to the scene to assist, but Costin refused to get out of the truck.

WSP attempted to break the windshield with less lethal rounds but was unable to. A ram was deployed on the end of a SWAT vehicle and used to remove the windshield. Officials said Costin continued to refuse to come out of the semi-truck so authorities used pepper ball rounds, flash bangs, and other less lethal munitions to get him out.

According to investigators, when he came out of the semi-truck Costin was armed with a knife and reportedly charged at an officer.