Yvonne Hiller was given two life sentences for killing two of her co-workers and injuring a third.
They all worked at the Kraft plant in Northeast Philadelphia two years ago when the shooting happened.
Hiller, 43, was suspended from her job that day after a confrontation with the three victims.
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She came back with a gun, forced her way through security and the three co-workers. The two women died and the man survived.
Hiller was found guilty two weeks ago. She was sentenced to two, consecutive life terms.