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There's a new reward tonight in the quest for the person who murdered a Duncanville great-grandmother.

Barbara Strain was shot and killed after answering a knock on her front door Wednesday morning. Her family was home at the time.

On Saturday, the reward was bumped up to $15,000 for an arrest and indictment in the case.

Anyone with information should contact Duncanville investigators at 972-780-5037.

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