The prosecution says Karen Read’s SUV was reversing at the exact moment John O’Keefe last used his phone — and their digital expert says the car’s own data proves it. On Day 19 of the Karen Read trial, jurors heard from forensic analyst Shanon Burgess again. Today, under re-direct examination, he broke down the Techstream event logged by Read’s Lexus and explained how it lined up with O’Keefe’s final phone activity. But as his timeline came under fire, so did his credibility.. again.