Police say a 20-year-old woman was outside her ex-boyfriend's house in the 7000 block of Sayers Street waiting for him to come home around 8 p.m. Sunday night.
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Investigators say she got angry when she saw her ex with another woman in his car.
Police say she grabbed a shovel and went after her ex. He was able to get the shovel from her.
That's when investigators say she went back to her car and grabbed a knife and went after the 22-year-old woman in her ex-boyfriend's car.
Investigators say that woman got a gun from the glove box and shot the ex-girlfriend in the head.
She was pronounced dead at the scene.
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The shooter and the ex-boyfriend were interviewed by investigators. They have not been arrested.
Houston police say the case will be referred to a Harris County grand jury.
The name of the woman who was killed has not been released.
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