Back to the time before photographs then - the 1800s. Crime scene photographs won't be evidence anymore. You photograph your flat (apartment) when you move in

Back to the time before photographs then - the 1800s. Crime scene photographs won't be evidence anymore. You photograph your flat (apartment) when you move in to prove that all the marks on the walls were already there and that won't be evidence anymore. The police mistreat you but your video of it won't be evidence either. etc