The MN man has been indicted on numerous charges, including impersonating an officer.
A child found the man's gun and it went off, striking and killing the boy.
Authorities allege the Minnesota man has a long history of deceit.
The indictment against Gisela Medina and GOP strategist Anton Lazzaro was unsealed Monday.
The break-in happened after false reports about a man's suicide spread on social media.
He was accused of hopping over the counter and repeatedly punching the employee.
A federal jury convicted the 40-year-old this week.
He also alleged he was helping to plot an attack on the State Capitol.
Charles Marquis Mitchell was on drugs when he assaulted the guard and two other inmates.
The abuse occurred in 2018.
The victim suffered severe brain trauma and was eventually transferred to a long-term care facility.
He returned the next day to take photos and saw off its head.
The popular social media user was seen on video holding a Molotov cocktail as it was being lit.
He'll face more than two years in federal prison.
He is accused of stealing people's identities to submit fake Unemployment Insurance applications.
The U.S. Attorney's Office says they shot a rifle at the pipeline, causing it to spill into a creek that connects to the Yellow Medicine River.
"I want you to be as scared as possible," the voicemail allegedly says.
The ATF learned about what he was doing from a Popular Science magazine article about him.
The far-right "Boogaloo" movement is seeking a second American civil war.
The armed robberies all occurred on July 30.