Joseph Jakubowski, who mailed manifesto to Trump, arrested in Wisconsin's Richland Center

MADISON, Wis. – A man accused of mailing a manifesto to the White House threatening attacks was captured Friday, WISN 12 News reported.

According to WISN 12, Vernon County officials received a report Thursday night about a suspicious person on a farmer’s property. At 6 a.m., the man was taken into custody without incident and later identified as Joseph Jakubowski, 32.

Jakubowski allegedly robbed a gun shop in Janesville, Wis. on April 4. The same day, he sent a 161-page manifesto to President Donald Trump.

According to the Rock County Sheriff's Office, it included grievances against government and personal angst.

"There were two themes in the manifesto," Janesville Police Chief David Moore said. "He was anti-government, and he certainly had his concerns on the federal government, and anti-religion. Those seem to be the two strongest themes."