Posts tagged forensics
Detecting fraud via fonts isn’t as sexy as sleuthing art forgery; it often involves tedious measurements with digital calipers, examinations under loupes and microscopes, charts that track the slight differences between two versions of the Times Roman face, or evidence that a particular form of office printer didn’t exist at the document’s dated execution.
via https://www.wired.com/story/meet-the-font-detectives-who-ferret-out-fakery/
But the well-publicized success stories obscure the fact that familial DNA searches can generate more noise than signal. “Anyone who knows the science understands that there’s a high rate of false positives,” says Erin Murphy, a New York University law professor and the author of Inside the Cell: The Dark Side of Forensic DNA. The searches, after all, look for DNA profiles that are similar to the perpetrator’s but by no means identical, a scattershot approach that yields many fruitless leads, and for limited benefit. In the United Kingdom, a 2014 study found that just 17 percent of familial DNA searches “resulted in the identification of a relative of the true offender.”
via http://www.wired.com/2015/10/familial-dna-evidence-turns-innocent-people-into-crime-suspects/
Perhaps the most dramatic example of a massive scandal that cannot seem to be reversed involves Annie Dookhan, a chemist who worked at a Massachusetts state lab drug analysis unit. Dookhan was sentenced in 2013 to at least three years in prison, after pleading guilty in 2012 to having falsified thousands of drug tests. Among her extracurricular crime lab activities, Dookhan failed to properly test drug samples before declaring them positive, mixed up samples to create positive tests, forged signatures, and lied about her own credentials. Over her nine-year career, Dookhan tested about 60,000 samples involved in roughly 34,000 criminal cases. Three years later, the state of Massachusetts still can’t figure out how to repair the damage she wrought almost single-handedly.
http://www.slate.com/articles/news_and_politics/crime/2015/10/massachusetts_crime_lab_scandal_worsens_dookhan_and_farak.single.html