Hari was arrested as he was traveling to a court appearance in Ford County on unrelated assault charges. According to the court affidavit, Hari often stays at his parents' home because his home has no running water or electricity.
Charges also state that, when drinking one night with Morris and McWhorter, a source said Morris began talking about throwing a black powder pipe bomb at a mosque in Minnesota.
According to the U.S. attorney's office in Springfield, Michael B. Hari, Joe Morris, and Michael McWhorter are suspected of carrying out the Bloomington attack, as well as attempting to bomb the Women's Health Practice abortion clinic in Champaign, Illinois, in November.
A confidential source told authorities that Morris said he made the pipe bomb that McWhorter threw into the mosque. An explosive device was thrown through the clinic window but failed to detonate, prosecutors said.
Hari is said to have promised to pay Morris and McWhorter $18,0000 for carrying out the attack.
A second informant came forward and proved information on Hari, McWhorter and Morris, saying they responsible for the bombing in Bloomington, Minnesota. McWhorter will make his initial appearance in connection with the attempted IL bombing at a later date.
According to the federal affidavit, one of the suspects, McWhorter, said the group bombed the mosque to "scare [Muslims] out of the country" and to "show them [Muslims], 'Hey, you're not welcome here, get the fuck out'".
The investigation is ongoing by the the FBI Springfield and Minneapolis divisions; University of Illinois Police Department; Ford County Sheriff's Department; Champaign Police Department; Illinois State Police and the ATF.
The Huffington Post reported that Hari was also a former sheriff's deputy and an IL contractor bidding to build President Trump's wall on the Mexican border. Hari drew up the proposal after launching a security company, Crisis Resolution Security Services, the newspaper said.
"While there are still many questions to be asked, we are grateful the people responsible for this attack will be brought to justice", said Jaylani Hussein, the executive director of the Minnesota chapter of the Council on American-Islamic Relations.
"This is definitely a relief that this case is finally to conclusion and those assailants-slash-suspects are apprehended and no longer a threat to our community", Hussein told the Associated Press in a telephone interview Tuesday.
The mosque primarily serves Somalis in the Minneapolis area. "Why this one out of the 75 mosques in Minnesota?" said Asad Zaman, an imam, and Muslim Society of Minnesota executive director. The FBI had offered a $30,000 reward for information leading to a conviction in the bombing.