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Watching Dexter this 'blood splatter anaysis' seemed beyond ridculous to me. I thought there were no way it would be a thing in the US in the way portrayed. Bu

Watching Dexter this 'blood splatter anaysis' seemed beyond ridculous to me. I thought there were no way it would be a thing in the US in the way portrayed. But then I learn truth detectors are? What more movie tropes are not tropes?

Hikikomori 2y ago
Plenty of techniques are based on junk science, much more in the past than now. Police/FBI don't actively try to find out if techniques are based on real science or not as they are useful in securing convictions. So called experts in these fields testify in trials and are paid quite a bit, it is in their interest to continue being paid so the fraud perpetuates. Unless you have money you have no way to put up a defense that can discredit expert witness testimony. https://www.theguardian.com/us-news/2022/apr/28/forensics-bite-mark-junk-science-charles-mccrory-chris-fabricant https://www.theguardian.com/us-news/2022/apr/28/forensics-bi...
- duped 2y ago
  Man it's shocking how bad forensic "science" is. If you watch Law & Order you may be convinced that police can detect gun shot residue on a suspects hands/clothing or match shell casings to a specific gun. It turns out just throwing handcuffs on someone is enough to get a false positive GSR test. And matching a shell casing to a specific gun is essentially impossible. The false positive rates on forensic "tests" are hard to study because no one has an incentive to, and if you go digging you'll find how bad they can be. Like for example K9 units have about a 50% false detection rate (dog indicated but no drugs/weapons/bombs found). If a cop told you they flipped a coin to decide whether to search a car then the search would be tossed out of evidence immediately!
- mrguyorama 2y ago
  The vast majority of "Forensic Techniques" used by cops are literally things an ex-cop made up / """observed""" and are now charging insane prices to go across the US, giving presentations to other cops or giving testimony in trials. It's a factless and truthless system.
NeoTar 2y ago
Fingerprints are less accurate and reliable than often portrayed in the media.
stefantalpalaru 2y ago
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Hikikomori 2y ago

Plenty of techniques are based on junk science, much more in the past than now. Police/FBI don't actively try to find out if techniques are based on real science or not as they are useful in securing convictions. So called experts in these fields testify in trials and are paid quite a bit, it is in their interest to continue being paid so the fraud perpetuates. Unless you have money you have no way to put up a defense that can discredit expert witness testimony. https://www.theguardian.com/us-news/2022/apr/28/forensics-bite-mark-junk-science-charles-mccrory-chris-fabricant https://www.theguardian.com/us-news/2022/apr/28/forensics-bi...

duped 2y ago
Man it's shocking how bad forensic "science" is. If you watch Law & Order you may be convinced that police can detect gun shot residue on a suspects hands/clothing or match shell casings to a specific gun. It turns out just throwing handcuffs on someone is enough to get a false positive GSR test. And matching a shell casing to a specific gun is essentially impossible. The false positive rates on forensic "tests" are hard to study because no one has an incentive to, and if you go digging you'll find how bad they can be. Like for example K9 units have about a 50% false detection rate (dog indicated but no drugs/weapons/bombs found). If a cop told you they flipped a coin to decide whether to search a car then the search would be tossed out of evidence immediately!
mrguyorama 2y ago
The vast majority of "Forensic Techniques" used by cops are literally things an ex-cop made up / """observed""" and are now charging insane prices to go across the US, giving presentations to other cops or giving testimony in trials. It's a factless and truthless system.

NeoTar 2y ago

Fingerprints are less accurate and reliable than often portrayed in the media.

stefantalpalaru 2y ago

[dead]