GREEN BAY (AP) -- A Wisconsin farmer accused of bombing three charter fishing boats has waived his preliminary hearing in federal court.
Joseph Sloma is expected to appear before a federal grand jury in the next 30 days for possible indictment.
A criminal complaint says the 47-year Denmark farmer and another man ignited a pipe bomb in a charter fishing boat called the Trout Scout in September 2009.
The explosion caused a fire that spread to two other boats. A nearby pleasure boat was also damaged.
The Green Bay Press-Gazette reports investigators at first were unable to determine the cause of the explosion.
But the complaint says seven months later, a confidential informant told investigators Sloma detonated the bomb because he didn't like the Trout Scout's owner.
Online Reporter: Alex Haight