![Perjury by Prosecution Witnesses](https://www.jurist.org/commentary/wp-content/uploads/sites/3/2019/12/guns_1575664413.png)
For more than 20 years, a key prosecution witness in Maryland criminal proceedings named Joseph Kopera, a firearms expert for the state crime lab, routinely and blatantly lied about his resume, background, qualifications, and other matters. Recently, the Maryland State Police discovered that he also forged signatures on firearms ballistics reports. His testimony was used [...]