A recent NYT op-ed strongly alerted readers to a study that found errors in DNA testing. The National Institute of Standards and Technology gave the same sample of DNA mixtures to 105 US crime labs and 3 Canadian ones and asked them to compare it to the DNA of 3 suspects from a mock robbery. A DNA mixture is a biological sample of 2 or more individuals from which a DNA profile could be drawn. Today’s DNA testing is advanced enough that an analysis can be done even if someone has lightly touched an object. The labs correctly identified 2 of the suspects, but 74 got Continue reading “DNA Testing and Errors”