Career
Born in Fort Worth, Texas, Marshall moved with his family to Cape Breton, Nova Scotia when he was a child. In 1999, Marshall moved to Culdesac, Idaho, with his father, Ralph, who served three years as mayor. Marshall was charged with aggravated assault when he was 15, in April 2001, after he brought an Arkansas-15 rifle onto his lawn where two youths were fighting.
While his father went to live in Arizona, and later Maine, Marshall moved back to his mother"s home in Cape Breton during the summer of 2003.
Out of 34 sex offenders listed on the Maine registry, Marshall took down the information on 29 of them. He began his Maine trip with a visit to his father, now living in Houlton, Maine.
Because his car had broken down during the drive, he borrowed his father"s truck, and took a.45 handgun from him. That night he shot and killed Joseph Gray, 57, in Milo, and William Elliott, 24, in Corinth.
When police stopped the bus he was aboard that evening, he shot himself in the head
Later investigation of the laptop he had brought with him indicated that he had gone to the residences of four other sex offenders. Reporters also turned up his website.