Complex sentence: They are taken to the police station, where Captain Mullens accuses them of the robbery but the Stooges fail the lie detector test (they fail on account of they break the machine) and their guilt cannot be proven.
Split into simpler sentences: They are taken to the police station, where Captain Mullens accuses them of the robbery. The Stooges are put through a lie detector test but the machine breaks down, and their guilt cannot be proven.