Dan Clevenger,  who was just elected mayor of Marionville last week, fixes small engines for living.  Some 12 years ago, he struck up a friendship with one of his clients.

"I considered him a friend. I didn't realize, you know, how bad off he was in his beliefs that he could do something like that, but I considered him a friend," said Clevenger.

That friend is Glen Miller who is suspected of killing three people on Sunday night at Jewish Centers near Kansas City.

From all their conversations, Clevenger said Miller's thoughts usually had one focus. "Him speaking out about Jews mostly."

Miller even gave Clevenger a copy of his book "A White Man Speaks Out."  In spite of the anti-Semitic's views, Clevenger never fathomed  Miller would turn violent. "I wouldn't have thought he would really do something like that. That's pretty bad."

A storied past, though, paints a violent picture according to the Southern Poverty Law Center, which closely tracks the activities of hate groups across America.

"He's one of the most frightening neo-Nazi characters out there for most of his life and he's about 73 now. Since a very early teen-hood he's been a very committed and extremely hardline first clansman and then neo-Nazi," said Mark Potok, Southern Poverty Law Center.

In 1987, Miller, along with two accomplices, was arrested at a mobile home park in Ozark.

"We have found what we suspect to be 20 pipe-bombs . We found all of the type of material that you would expect somebody that was involved in paramilitary activities to have," explained a law enforcer back in 1987.

The Former Ku Klux Klan leader pleaded guilty to federal weapons charge and mail threat.  Miller also sent a Declaration of War letter against the federal government to the media; he claimed to have teams of freedom fighters prepared to start a race war.

"He also said that he would die with contempt on his lips and a sword on his hand," said another law officer during the 1987 incident.

While Miller has been a professed anti-Semite for decades, Mayor Clevenger believes the suspect may have acted now because he had nothing to lose. 

Clevenger said Miller told him he had some health problems, but he didn't tell the mayor the nature of those alleged ailments.