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A celebrity impersonator, who performed at a party in a ritzy hotel, is found dead in a men's room stall. She was drowned in the toilet. The investigation reveals the victim confronted a congressman, at another hotel event, shortly before being murdered. Across town, a man's body is found inside of a city salt truck. Also, Lindsay is asked to testify in a multiple-homicide trial in Montana. She was the only witness to the murders of four of her friends.