A person already in prison has been sentenced to 80 years in federal custody after authorities said the inmate built two bombs while behind bars and mailed them to a federal courthouse in Anchorage, Alaska, and the Department of Justice in Washington, D.C.

Federal prosecutors on Tuesday announced the sentence for the inmate authorities identified as David Dwayne Cassady, 57, who was incarcerated in a state prison in Georgia when the devices were made, authorities said. The inmate pleaded guilty to two counts of attempted malicious use of explosive materials.

The inmate has severe anxiety and gender dysphoria, defense lawyer Tina Maddox wrote in a sentencing memo to the court. The crimes were “acts of desperation born out of unrelenting abuse, hopelessness, and mental distress,” Maddox

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