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Ex-Alabama professor who shot three colleagues won't be tried in brother's death

Sept. 11, 2012: Amy Bishop is escorted by sheriff's deputies at the Madison County Courthouse in Hunstville, Ala.

Sept. 11, 2012: Amy Bishop is escorted by sheriff's deputies at the Madison County Courthouse in Hunstville, Ala.  (AP2012)

Massachusetts prosecutors have withdrawn a murder charge in the 1986 death of the brother of a former Alabama professor who fatally shot three colleagues.

The announcement Friday by the Norfolk district attorney follows Amy Bishop's sentencing this week to life in prison without parole for the killings at the University of Alabama-Huntsville in February 2010.

In a statement, the office said the life sentence they would seek in the 1986 killing of 18-year-old Seth Bishop was identical to the punishment she received in Alabama, so there was no need to move forward.

Authorities initially ruled Seth Bishop's shooting accidental. That was based partly on claims by Bishop's mother, who said her daughter didn't mean to kill him.