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A Washington state woman convicted of killing six family members, including two young children, was sentenced to life in prison without parole Thursday.

Michele Anderson did not speak before a judge imposed the sentence, NBC affiliate KING 5 reported.

Anderson, 37, was convicted by a jury in March of six counts of first-degree murder in the killings on Christmas Eve of 2007 in Carnation, a town of 1,700 about 20 miles east of Seattle.

Anderson and her boyfriend, Joseph McEnroe, fatally shot Anderson’s parents, her brother and his wife, as well as that couple’s two children, 5 and 3 years old.

McEnroe was convicted in March of 2015 and is serving life in prison without the possibility of parole.

Anderson was the alleged mastermind. Court documents say Anderson told detectives her brother didn’t pay back money she loaned to him, and her parents were pressuring her to start paying rent for staying in the trailer on their property.