HUNTSVILLE, Ala. (AP) -- A judge has delayed the trial of a former Alabama university professor accused of killing three colleagues and wounding three others during a campus faculty meeting.

Madison County Judge Alan Mann didn't give a reason Tuesday as he pushed back the trial of Amy Bishop by two weeks. It will now begin Sept. 24 in Huntsville.

Attorneys for the Harvard-educated biologist have been fighting with the state over payments for expert witnesses they say are needed to prepare her insanity defense.

Bishop is charged with pulling out a handgun and opening fire during a meeting at the University of Alabama in Huntsville in February 2010.

Prosecutors are seeking the death penalty against Bishop. She's also charged in the shotgun death of her brother in Massachusetts in 1986.