In 2005, he was sentenced to prison on charges of terrorism after he confessed to plotting, with the group's leader Irv Rubin, to blow up the office of Arab-American congressman Darrell Issa and the King Fahd mosque in Culver City, California.
[5] Bomb components including pipes, end caps, detonators and gunpowder were confiscated along with multiple rifles and handguns.
[2][6] In December 2001 Krugel and Rubin were arraigned on conspiracy charges to send explosives to the Sherman Oaks office of U.S. congressman Darrell Issa, a Lebanese-American, and to bomb the King Fahd Mosque in Culver City.
[citation needed] Part of the plea agreement demanded that Krugel reveal the names of all JDL activists involved in the 1985 bombing of Alex Odeh's office.
[2][4] On November 4, 2005, at the Federal Correctional Institution in Phoenix, Arizona, Krugel, BOP# 20966-112, was murdered by a member of the Aryan Brotherhood prison gang,[7] who used a concrete block to strike his head.