While investigating the murder of a transgender showgirl, the CSIs work to narrow down their suspect list from a large number of guests since the victim was murdered outside a congressional banquet and a magazine launch party at the hotel. Stella and Sheldon face an uphill bureaucratic battle when they learn that the victim was involved in a heated argument with a congressman shortly before being killed. Meanwhile, while questioning the business partners of the president of an extreme sports company whose body was found inside a city salt truck, Mac and Danny discover an alibi business where trained professionals create the perfect cover for their clients' indiscretions. Also, Lindsay must take a leave of absence and return home to Montana when she's called to testify at her friends' murder trial.
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