Subject was a passenger in a tractor trailer involved in a collision on I5 in Cowlitz County, killing both the passenger and driver. The trucker's route was traced using fuel receipts which departed Missouri on May 7, 1991, drove through Kansas, Colorado, Wyoming, Utah, Idaho and Oregon before arriving in Washington on May 14th. The load was dropped off on time and the trucker was heading south to Portland when his truck rear-ended another vehicle after pulling onto Interstate 5 near Kalama. The collision set off a fire that gutted the truck’s cab. The trucker was known to pick up hitchhikers, but no one knew of anyone riding in his semi that day.