"A man was discovered with his phone and selfie stick at the bottom of a 100-foot cliff at Long Men waterfall in Zhejiang. Based on photographic evidence on his

"A man was discovered with his phone and selfie stick at the bottom of a 100-foot cliff at Long Men waterfall in Zhejiang. Based on photographic evidence on his phone, local police speculated that he lost his footing while taking a selfie and fell to his death. It was not known when he died or how long his body had been there." If they have photographic evidence from his phone shouldn't they know exactly how long he had been there?