A large number of common forensic techniques including bite marks, hair analysis, ballistics, fingerprint IDs and footprint analysis were called into question last year. The President's Council of Advisors on Science and Technology, a nonpartisan group established by Congress in 1976, issued a report that debunked the evidence produced by the techniques as unscientific.
Federal criminal defendants are being denied their full right to confront the evidence against them, according to a lawsuit recently brought by the American Civil Liberties Union. This is because the U.S. Department of Justice doesn't notify defendants when evidence against them was obtained via secret wiretaps and other surveillance under the Foreign Intelligence Surveillance Act or the Wiretap Act.
The U.S. Probation and Pretrial Services has apparently been using lie detector tests as on criminal defendants in what it refers to as "therapeutic polygraphy." That this has been going on for decades comes as a surprise, since in 2004 the American Psychological Association said that there is "little evidence that polygraph tests can accurately detect lies."
The Associated Press has obtained information about an upcoming policy guidance memo that would urge prosecutors to file the most serious charges they believe they can prove in court. This would be a reversal of the Obama Justice Department's guidance that low-level offenders should not be sentenced to long-term incarceration.