A state penitentiary inmate who slashed the throat of Spokane rapist Kevin Coe in a prison day room has been sentenced to an additional 15 years and four months in prison.

Walla Walla County Superior Court Judge Donald W. Schacht rejected a request by Timothy Cannon’s attorney for a lenient sentence and called Cannon a “troubled man.” The sentence Schacht ordered Tuesday was at the high end of the standard sentencing range.

Cannon, who pleaded guilty in February to firstdegree assault, will begin serving the sentence after his present prison term expires in January 1998.

Cannon attacked Coe in April 1994, slicing his neck with a homemade knife fashioned from a razor blade and a toothbrush. The wound required 100 stitches to close, and Coe has since recovered.

Coe was convicted in 1981 of four in a string of more than 40 sexual assaults that took place in Spokane’s South Hill neighborhood. All but one of Coe’s four convictions have been overturned on appeals.