The Wisconsin progressive activist who harassed Republican lawmakers while riding a Segway has been arrested and charged with attempting to possess radioactive material “with intent to kill.”

TMJ4 reports 30-year-old Jeremy Ryan, subbed “Segway Boy,” “attempted to buy the lethal dose in March and October of 2018.”

It’s not clear why he wasn’t arrested for the March attempt.

Fox 6 reports:

Following Ryan’s arrest in Black Earth, WI, a search warrant was executed at his residence in Madison by FBI Milwaukee and FBI Chicago’s Hazardous Evidence Response Team. There is no danger to the public associated with these enforcement actions.

The case is being prosecuted by the U.S. Attorney’s Office in the Western District of Wisconsin.

In 2016, he was arrested on drug charges, according to Watchdog.org.

Jeremy J. Ryan, 28, of Madison, was arrested on three felony counts of manufacturing and delivering marijuana and one felony count of maintaining a drug operation, according to court records.

Ryan was officially charged on Wednesday, according to the Dane County District Attorney’s office, and was scheduled to make his initial court appearance Thursday.

“In June 2015, the professional protester was among six Capitol demonstrators awarded a combined $45,000 in damages for the ’emotional distress, loss of liberty and damage to reputation’ they apparently suffered” related to protesting Gov. Scott Walker’s budget solutions, according to the news site.

Ryan tried to mount a campaign against U.S. House Speaker Paul Ryan in 2012 but failed.

In this campaign video, titled, “Pissed The F*ck Off,” Ryan rants about the country, and shows a doctored photo of Speaker Ryan that appears to show a man giving him oral sex.

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He goes on to claim “cannabis” helps him when he’s “pissed the f*ck off.”

The radioactive material charges carries a maximum penalty of life in prison, according to NBC 15.