CHICAGO -- A former Iowa letter carrier who sent dud pipe bombs to investment firms has apologized in a federal courtroom in Chicago.
John Tomkins told a judge that he was "incredibly sorry" and that "there are no words to describe the shame" he feels.
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The Chicago Sun-Times reports (http://bit.ly/Z6L0Cg ) that Tomkins made the apology at a pre-sentencing hearing Friday.
In court testimony last year, Tomkins admitted to sending threatening letters and nonfunctioning bombs to investment advisers from 2005 to early 2007. It was part of a scheme to drive up the value of stocks he owned.
Tomkins became known as "The Bishop" bomber after signing his notes with that moniker.
A jury found him guilty of all 12 charges he faced.
Judge Robert Dow says he will sentence Tomkins May 21.