A model is found dead. They learn she was poisoned. They focus their attention on her husband whom they learn has a temper, is a philanderer, and is in need of money which his wife has. They later learn that the husband of the woman he was seeing, was the one who did it. And they learn he did the same thing to his wife and she is dying. He could help her but because he's under arrest he can't, so they try to find a way. Written by
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[Leaving a house where the wife told Benson one version and the husband told Stabler another version
So you get an affair. I get a fairy tale.