David Robertson, a former Metra police officer, was charged with with aggravated battery, perjury and official misconduct for his behavior in the 2015 arrest of N’Ardo Mack, who spent almost two years in jail for crimes he didn’t commit. Robertson had made a video recording of the surveillance video on his own cell phone, showing his attack on Mack. Other Metra officers can be heard on Robertson’s recording, laughing at Mack. The cellphone video was turned over to prosecutors, who used it in a decision to drop charges against Mack and charge Robertson instead. (Romanucci & Blandin, LLC)