John Tomkins, a man better known to fundsters as "The Bishop," was convicted of mailing pipe bombs to mutual fund firms including American Century [profile] and Janus Capital [profile] .

Tomkins is a 47-year-old machinist from Dubuque, Iowa, and was tried in Federal Court in Chicago.

The jury found him guilty of one count of using a destructive device while mailing a threatening communication, two counts of possessing an unregistered destructive device, and nine counts of mailing a threatening communication, reports Reuters.

He will be sentenced in August and faces life in prison. 

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