NCR in a police station can refer to two different things, depending on the context. Here are the two possible meanings:

1. Non-Cognizable Report: A non-cognizable report, also known as NCR, is a type of police report that is filed for non-serious offenses that do not require immediate investigation or arrest. Examples of non-cognizable offenses include minor traffic violations, petty theft, and simple assault. When a non-cognizable report is filed, the police cannot arrest the accused without a warrant, and they cannot investigate the case without the permission of a magistrate.

2. Not Criminally Responsible: NCR can also stand for "Not Criminally Responsible," which is a legal term used to describe a person who has committed a criminal offense but is not held criminally responsible due to a mental disorder. This means that the person cannot be convicted of the crime, but they may be subject to other legal measures, such as being detained in a mental health facility.

It is important to note that the meaning of NCR in a police station can vary depending on the country and jurisdiction.