The basic difference here is that an interview is typically a less formal and accusatory conversation whose main point is to elicit information whereas aninterrogation is formal and is mainly designed to get a suspect to confess. ... By contrast, an interrogation is an interaction between police officers and a suspect.... In simpler answer a interview is a conversation meant to get to know the person being interviewed or to get a state of their mind.. A interrogation is something done by the police to find evidence or get something out of a possible suspect