- There is enough evidence that someone has committed a crime serious enough to warrant being taken into custody (police detention).

Some of the possible reasons for taking someone into custody include:

1. If someone is caught in the act of committing a crime.
2. If there is sufficient evidence that they have committed a crime, such as witness statements, physical evidence, video footage, etc.
3. If there is a warrant out for their arrest.
4. If they are a flight risk or a danger to themselves or others.
5. If they have violated the terms of their bail or probation.
6. If they are a suspect in a serious crime and need to be questioned further.

In these cases, it is important for law enforcement to take the individual into custody in order to protect public safety and ensure that justice is served.