Manhunt for Joseph Jakubowski of WI, Armed & Dangerous

Joseph A. Jakubowski 32 allegedly robbed a gun shop in Janesville Wisconsin

"Basically he's angry at all government officials", Rock County Sheriff Robert Spoden said at the press conference.

In this Thursday, April 6, 2017 photo, Federal Bureau of Investigation agents pass through a resident's front lawn while searching for Joseph Jakubowski, in Janesville, Wis.

A nationwide manhunt is on for a Wisconsin man wanted for a series of crimes including stealing over a dozen guns and allegedly plotting mass violence targeting law enforcement and political figures. The country sheriff's office said the manifesto included anti-religious views, prompting an increase in patrols near churches.

Monday investigators released photos of tattoos worn by Jakubowski, and authorities say they have received more than 500 tips, including 150 on Monday alone.

According to CBS, authorities found a burned vehicle registered under Jakubowski's name near the gun store on Tuesday.

An alert was issued Monday for Wisconsin schools, citing a threat in the letter by Jakubowski to "unleash the stolen weapons" inside the buildings. Police said Sunday they've identified the suspect who came to the church on Thursday, and that person is NOT Jakubowski.

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Now footage has surfaced of Jakubowski mailing a thick envelope to the White House; authorities say it was a copy of his anti-government and anti-religion manifesto. Police say he also bought a bulletproof vest and helmet.

Authorities promptly notified local law enforcement officials and schools of the report, and nearby school districts implemented unspecified safety measures, reports nbc15.com.

The mailed package contained a 161-page manifesto featuring anti-government rants and "personal angst against anything other than natural law or rule". Back in 2008, he attempted to steal a gun from a police officer and has committed more misdemeanors in the past. Authorities believe he torched it purposely.

The FBI is offering a $10,000 reward for information leading to his arrest.

Jakubowski is described as 5-foot-10, weighing approximately 200 pounds with green eyes and brown hair.