Comment by anilakar

DNA too. Until 2018 it was used here as waterproof evidence until the police managed to lock up an innocent person based on DNA and blurry surveillance camera photos only. He was only exonerated because the real perpetrator was caught by chance and confessed a week later.

The transmission chain that was later identified on CCTV was hand to escalator rail to hand, a 2+ km walk, and finally hand to latex glove.