Transcript for 'Armed and dangerous' man suspected of plotting mass attack

Back here at home to the intensifying manhunt for the suspect called armed and dangerous. Investigators tracking more than 200 leads to pin down the Wisconsin man who apparently filmed himself mailing a manifesto to president trump. What he's accused of plotting. Here's Eva pilgrim. Reporter: Authorities are asking for the public's help to find this man in a newly released image plotting an act of mass violence. This subject continues to remain a threat and need to be vigilant for their personal safety. Reporter: This is Joseph Jakubowski seen Tuesday at a gas station. In Wisconsin. Never forget his face. Ever. Reporter: He posted this video to his social media account and mailing this envelope to the president. Here it is. You see it's getting shipped. Revolution. It's time for change. Reporter: Inside, investigators say plans of a brutal attack and disparaging comments about the president all in a 161-page anti-government manifesto. Address. Leaving. Reporter: Police say you can see Jakubowski in this photo stealing 16 firearms from a gun shop before setting his car on fire and disappearing. Authorities are calling him armed and dangerous. Investigators using dogs, planes and more than 150 officers to search. Tonight his neighbor on edge. I just want this to end. I just -- I want to feel safe in my home again. Reporter: The FBI is now offering a $10,000 reward for information leading to Jakubowski's arrest. They're hoping he turns himself in but asking for the public's help.

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