The term "custodial interrogation" implies that the police are conducting an investigatory interview and that the subject who they are interviewing, is probably their suspect, and is not free to leave.

Yes. A Miranda warning is only necessary before a custodial interrogation. A photograph is not an interrogation.

Custodial interrogation implies that an authority (police, corrections) conducts an interview with an subject which is of interest to their investigation with the condition that the subject is not free to go on his or her own volition. The subject may be an inmate in a correctional institution or may be held as a material witness.

True

The two components needed for the Miranda warning to take effect are custodial interrogation and the individual being in police custody. Custodial interrogation refers to questioning that occurs when a person is in police custody and the freedom of movement is restricted. The Miranda warning must be given to the individual before any interrogation takes place while they are in police custody.