Thomas Silverstein, a triple murderer who spent decades in solitary confinement in federal prison, died at a Colorado hospital this month, officials said Wednesday.
Silverstein died May 11, according to the Federal Bureau of Prisons. He was 67.
He had lived in solitary confinement since killing a prison guard in 1983, a span of more than 35 years. Much of that time he was subject to an unusual no-contact order in which he had little interaction with other people.
Silverstein is believed to have served the longest term in solitary confinement in the federal penitentiary system.