Or the Shirley McKie debacle in Scotland in 2005, where it turned out that finger print detection was more of an 'art' than a science. The ball got rolling once they started convicting police officers (so at least the analysis was double-blind?)

Or the phantom of Heilbronn, where dozens of crimes were linked to a single woman. Who turned out to be the lab technician that assembled the kits. Doubts started once they discovered the caucasian female DNA in cells of the charred remains of a black male.

I often wonder how prosecuters defend against the use of these cases to create doubt.

https://en.wikipedia.org/wiki/Shirley_McKie

https://en.wikipedia.org/wiki/Phantom_of_Heilbronn