For years, Justice Department officials have known there were flaws in the forensics behind a long series of criminal cases they prosecuted. They even appointed a task force to study the problems. What they didn’t do was tell defendants who were convicted using the flawed data. A Washington Post investigation uncovered that Justice Department officials have known for years that flawed forensic work might have led to the convictions of potentially innocent people, but prosecutors failed to notify defendants or their attorneys even in many cases they knew were troubled. The Post’s package included video profiles of two men who were jailed because of the errors„ a database of convictions linked to the FBI lab’s suspect forensics, and an interactive graphic explaining the reliability of different types of analysis. Users can click through an interactive graphic to learn about the reliability of different types of forensic analysis.