In its report, the President’s Council of Advisers on Science and Technology urging judges to reconsider admitting certain types of forensic science in the courtroom. In particular, the court criticized “feature-comparison” techniques like bite-mark comparison and tire tread mark comparison as lacking scientific validity. It also specifically pointed to firearms tracing and the science’s lack of corroboration but noted that such a technique could be promising. While the report acknowledged the validity of many types of DNA analysis, it also found that techniques used to analyze more complex DNA mixtures was “not a reliable methodology.” The report also warned of bias in forensic science and warned against relying on the subjective views of law enforcement officers.