I was talking specifically about alternative to video cameras. DNA and Finger Printi/ DNA are only relevantforr certain type of crimes that involve close contact (rape, murder, roberry) but they are not alternative to cameras. You can’t use them for crimes like hit&run, Firing projectiles, abduction , deciding who is at fault in an accident, showing police using force without reason, someone accepting bribe , …

DNA, Fingerprint are complementary tools not replacement