Two St. George residents were killed Saturday night when the motorcycle on which they were riding struck a semi-truck on Interstate 15 aTwo St. George residents were killed Saturday night when the motorcycle on which they were riding struck a semi-truck on Interstate 15 about 25 miles south of the Utah border, according to the Arizona Department of Public Safety.
Public information officer Carrick Cook said Monday that the driver of the motorcycle, Robert Wesley Crawley, 52, and his passenger, Shelley Willis Vincent, 48, both died at the scene of the 7:36 p.m. accident.
The motorcycle was traveling southbound when it struck the southbound tractor-trailer semi-truck, Carrick said.
He said that "speed too fast" on the part of the motorcycle was cited at the cause of the crash.
The driver of the truck, Tadeusz Prokopczuk, was not injured.
shunt@sltrib.com