Unfortunately I'd say get rid of him too. Yes all dogs have the potential to be or turn agressive. However it is in the genetic makeup of these dogs, they've been bred for years to be agressive and it does still pass on genetically to the breed.

PP have said they supervise their dog/children always - but there is always going to be the chance that you turn your back for that second. No one can say their dog will always be locked in, always supervised, always say - no one, because we are all human and accidents happen, gates get left open, tragedies occur.