Federal jury convicts man accused of detonating a pipe bomb at Hinsdale Metra station in 2006

Mario Petitti/Chicago Tribune/TNS

A federal jury found Thomas Zajac, 70, guilty of detonating a pipe bomb at the BNSF Railway station in Hinsdale on Sept. 1, 2006, causing damage to the station injuring a station worker.

Zajac, a former resident of Oakbrook Terrace, was convicted Monday of one count of attempting to destroy property with an explosive device, one count of possessing an unregistered destructive device and one count of willfully making a threat through the mail to kill or injure a person with an explosive device, according to a news release.

A month after the explosion, Zajac sent a letter to the Hinsdale Police Department calling the attack a “warning shot” threatening future attacks, the U.S. Attorney’s Office said in a news release.

According to Federal government’s evidence Zajac felt disrespected when a family member of Zajac was arrested by Hinsdale Police a year prior to the attack.

The destruction of property count carries a mandatory minimum sentence of five years in federal prison with a maximum of 20 years, the counts of possession of an unregistered destructive devise and threat to injure with an explosive device each carry a maximum sentence of 10 years.

U.S. District Judge Matthew F. Kennelly set a sentencing date for Dec. 13.