05-15-2023, 08:34 PM
mikebw wrote:
[quote=RgrF]
Visualize it!
Police arrive at a murder scene, immediately seal off the room and suction the existing air into an analyzer unit and then go build a case against a suspect.
Of course if someone were to "steal" your air you could easily be placed at a scene and made a suspect.
DNA evidence is almost wholly unreliable precisely because it is so easy to pick it up. Your clothes pick up DNA from your co-workers and their family and their pets and you then carry it home with you and scatter it around. It’s in your car. It’s in your food. It’s everywhere. And yeah, it’s just very small traces, but when they test for DNA they “amplify” every piece of DNA they pick up. If it’s not blood on the murder weapon, it’s probably not good evidence that someone was actually present anywhere that the DNA was found.
Courts are only just now glomming onto that, but a lot of judges/juries still hear “99.99% certainty that the DNA we found belongs to the suspect” and then jump to the conclusion that science just proved a criminal act, so lawyers love it.