Law enforcement officers are warning other officials and forensic experts that iPhones which have been stored securely for forensic examination are somehow rebooting themselves, returning the devices to a state that makes them much harder to unlock, according to a law enforcement document obtained by 404 Media.The exact reason for the reboots is unclear, but the document authors, who appear to be law enforcement officials in Detroit, Michigan, hypothesize that Apple may have introduced a new sec...