Double Cap - S1-E19
Factual error: During their investigation, the CSIs learn, through a number of phone calls she made to her mother, that their murder victim was in the Witness Protection Program. Contacting family members is one of the cardinal sins of WITSEC; she would have been immediately relocated with another new identity, and not left in a city where people who want her dead know where she is.
Answer: Earlier in the episode, Horatio tells Mac that Penrod was seen in Tribeca getting his leg set, only to bolt when he learned a nurse wised up the cops. Caine and the NYPD probably got Penrod's address from the hospital.
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