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An inmate using a “shank” — a homemade edged weapon — attempted to kill a guard Monday at the state prison in Boscobel, the Grant County Sheriff’s Office said.

Sheriff Nathan Dreckman said the Grant County District Attorney’s Office is being asked to charge inmate Dexter Ewing, 47, with attempted homicide.

The 42-year-old guard at the former Supermax prison was treated at Gundersen Hospital in Boscobel for injuries to his neck and face and released, Dreckman said.

The Sheriff’s Office was notified of the stabbing shortly before 9 a.m. Monday. The guard who was stabbed and another guard were able to disarm Ewing before he caused serious injuries, Dreckman said.

Ewing ended up at the Wisconsin Secure Program Facility in Boscobel after a jury convicted him of first-degree intentional homicide for killing another inmate at the state prison in Portage in 2015. Ewing previously was convicted of homicide in Milwaukee County and already was serving a life sentence.