A Case Of Mistaken Identity

( an innocent person was believed to be guilty ... )

A case of mistaken identity is when one person was accidentally thought to be another person. Example: "Are you sure you are not Don Johnson?" Reply: "Really, I am not. It must be a case of mistaken identity."

A case of mistaken identity is when a person is pointed out because she was thought to be another person. Example: "I heard they caught the guy who robbed that bank." Reply: "It was a case of mistaken identity. They arrested the wrong guy."