The leader of a Michigan militia group charged this week with conspiring to kill law-enforcement officers was described Tuesday as a private, family-oriented man who nurtured a festering mistrust of governmental authority, according to people close to the family.

"On the inside of this man's brain, something evil lurks, and until you get to know him, you don't know it," said Andrea Harsh, who was engaged to David Brian Stone Sr. until the couple broke up last year.

She described Stone, a trim 45-year-old man who wears his whitish hair cropped short over spectacles and a bushy gray mustache, as having a "bubbly personality." But he became consumed by the Hutaree, she said, a southeastern Michigan militia group that described its members as "Christian warriors."

In an indictment Monday, federal authorities named Stone as leader of the Hutaree and accused him and eight members with plotting to spark an uprising against the U.S. government by killing police. Along with Stone, seven other men and one woman from Michigan, Ohio and Indiana are in being held without bond on weapons and sedition charges.

The indictment said Hutaree had practiced attacks and other military maneuvers for more than a year, and had planned to kill a law-enforcement officer, then use homemade bombs to attack officers who attended the funeral.

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An undercover agent played a role in the investigation that led to Monday's indictments. Grand jury testimony by a law enforcement officer referred to an "undercover FBI agent" who worked on the case. The FBI declined to comment, but infiltration is a common tactic for law-enforcement officials targeting domestic militia groups.

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