doppleganger
A misspelling of the German, "doppelganger", roughly translates as "evil twin". Can be used literally, as in example below.
Example:
"A man was falsely convicted of rape when his doppelganger went on a sexual crime spree. The mistaken identity led to his conviction."
"A man was falsely convicted of rape when his doppelganger went on a sexual crime spree. The mistaken identity led to his conviction."