MADISON, Wis. (AP) — A Wisconsin political activist who admitted to trying to buy a lethal dose of a radioactive substance online has been sentenced to two years of supervised release. Thirty one-year-old Jeremy Ryan also was sentenced Wednesday to time served. He’s been in custody since his arrest in October 2018. Ryan pleaded guilty last month to one federal count of attempting to receive a nuclear material. According to court records, Ryan was arrested after picking up a package that he bought from an undercover FBI agent on the dark web. Ryan’s attorneys maintained that he intended to use the material to kill himself.