Complex sentence: Masada arrives at the police station to try and prove his theory to them once more, this time he invites them to go back to the hospital with him where he announces that he has collected witnesses that will prove his theory.
Split into simpler sentences: Masada arrives at the police station where he tries to prove his theory to them once more. This time, he invites them to go back to the hospital with him, where he announces that he has collected witnesses that will prove his theory.