Example of a Police interview and a police interrogation?

An interview is less formal. The purpose is to seek information. It could be from a victim, suspect, or witness.

An interrogation is formal and more specific, The focus is on the suspect and the questions are accusatory.

An example of each from a bank robbery: An interview would be asking someone what they saw. An interrogation would be asking someone if they were the one that robbed the bank.

Interview is usually the first one, where they are trying to weed out suspects. It's usually fairly nice, and not personal. You usually come there willingly, and are allowed to leave.

An interrogation usually follows an arrest. It's more brutal (sometimes literally brutal, yelling in your face, repeatedly telling you you are guilty whether they know for sure or not). They can leave you in a room for hours on end (had a friend in an interrogation room for almost 8 hours) watching you. Depends on the morally of the cop, they can try to deny you water, food, sleep and outside contact.