HUNTSVILLE, Ala. (AP) — Court officials say a former professor has pleaded guilty to fatally shooting three colleagues and wounding three others at a faculty meeting at the University of Alabama in Huntsville.

Amy Bishop on Tuesday pleaded guilty to one count of capital murder involving two or more people and three counts of attempted murder.

Prosecutors were seeking the death penalty against the Harvard-educated Bishop. Sentencing in the case will be after a Sept. 24 hearing.

The former biology professor previously had pleaded innocent by reason of insanity in the February 2010 shooting.

WBZ NewsRadio 1030′s Ben Parker with Brian Lawson, Court Reporter at Huntsville Times

Bishop also is charged with killing her brother in Massachusetts in 1986. That shooting was originally ruled accidental, but the Alabama slayings prompted a new investigation and charges.

Copyright 2012 The Associated Press.