It is true that it is an injustice when someone is sent to jail for a crime he or she didn't commit.
Explanation: People are sent to the jail and are imprisoned if they have committed a crime and the purpose of sending them to the jail is to improve them and to make them feel guilty about the crime that they have committed so that they can feel sorry about it.
But sending those people to the jail who have not even committed the crime is considered to be an injustice thing and is not fair on the part of the officials to send such people to the jails or to punish them for the thing they have not even done.
