I believe this is the episode you are looking for:
Season 5 - Episode 16 – Titled “Bad Reputation”
“The hand of a man the police thought was a fugitive since 1997 turns up with no body attached to it. The team learns that a drug dealer had been using the hand for fingerprints and swears the man who the hand belonged to was found dead in 1997…”
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I believe this is the episode you are looking for:
Season 5 - Episode 16 – Titled “Bad Reputation”
“The hand of a man the police thought was a fugitive since 1997 turns up with no body attached to it. The team learns that a drug dealer had been using the hand for fingerprints and swears the man who the hand belonged to was found dead in 1997…”