Pilot A (PPL) delivers a/c within the UK. He takes along Pilot B (ATPL). Due to fuel mismanagement the a/c crashes and CAA prosecutes Pilot B, the most experienced pilot, for running out of fuel. This is obviously much more serious for an ATPL than a PPL.
Turns out they hadn't run out of fuel and Pilot A had logged the flight as PIC so case dismissed.
A real case. The aircraft was a C337 which crash landed near the M25.