Eric Knysz, 20, has been declared brain dead. Officials say his family has decided to donate his organs, and he will remain on life support until they are removed.
Knysz, the son of a retired police officer, was 19 when he shot Trooper Paul Butterfield during a traffic stop in Mason County. He was sentenced last week to life without parole.
On Thursday, Knysz was transferred from the Mason County Jail, where he had been on suicide watch, to the Charles Egeler Reception and Guidance Center in Jackson. He was found hanging in his cell Monday.
A friend told WOOD-TV that his family is "confused" about what happened. Law enforcement sources said that Knysz left a brief note for his family.
Someone speaking for the family said Knysz remains on a ventilator at Allegiance Health Center in Jackson. Tests to determine if his organs can be donated were expected to be completed this week.
Notable deaths of 2014 [PHOTOS]