At least 99% of the time, forensic science is reliable and believed to be accurate. Although four experts compared Brandon Mayfield's fingerprint to the fingerprint on a bag at the crime scene, they actually misidentified the evidence, and Spanish police discovered that the hidden fingerprint actually belonged to an Algerian . This proved that forensic experts and lawyers can definitely be wrong; Furthermore, you are advised that not all evidence presented in the case is subject to being foolproof and there is a possibility that a mistake could be made. Leah Bartos, a journalism graduate student at UC Berkley, conducted an experiment to understand the process of becoming a certified forensic consultant. She had no prior knowledge of the forensic discipline, but became certified after passing the open book exam and submitting her degree, resume and references to ACFET. The ACFET exam has a 99% pass rate; therefore, it is criticized for the reliability of its certified graduates and labeled as a for-profit diploma milling organization. The lawyer can argue the weakness of the forensic evidence presented, so forensic science requires bad science and can definitely be misused in our legal cross-examination