Siterwell Smoke Detector GS508

gs508I have a Old Shark dash cam Model GS508 . I had a crash and can not find any files prior to or of the crash , only files after the crash about 5 minutes. Any ideas of what to doThe SafeHome GS508 is a battery operated smoke detector which utilizes a photoelectric sensor. Photoelectric technology allows the detector to be more sensitive to detecting slow smoldering