Which of the following is not typically considered a non custodial interrogation?

A non-custodial interrogation is one where the suspect is not formally arrested or deprived of their freedom of movement in a significant way. Detaining a suspect in a police station typically implies a level of custody; the suspect is not free to leave and is under police control, which constitutes a custodial situation. This environment inherently leads to more coercive elements, as the suspect may feel compelled to answer questions due to the context of being at a police facility.

In contrast, interviews in a suspect's home, questioning while waiting for a bus, and asking questions in a public place do not involve formal detention and allow for the possibility that the suspect can leave at any time, which aligns with the definition of non-custodial interrogations. Thus, the correct answer highlights a scenario that clearly deviates from the characteristics of non-custodial interrogation.