JERSEYVILLE – The second 18-year-old charged for his role in a video-recorded Jerseyville mob attack recently pleaded guilty.Lucas C. Roberts, 18, of Jerseyville, entered the guilty plea in Jersey County Court on the morning of Aug. 31, 2026.Roberts pleaded guilty to each of the charges against him, including a Class 3 felony count of aggravated battery/video/audio recording, a Class 4 felony count of mob action and a Class C misdemeanor count o…