If you read how Harris reacted to the juvenile diversion program, it wasn’t Zoloft that made him a killer. He was a psychopath. He had contempt for everyone around him and he was a master manipulator. He didn’t only fool his parents. He also fooled the people who monitored him in the juvenile diversion program. Psychopaths learn how to say what people want to hear and how to make people like them to manipulate them. Many people are unable to imagine another human being that has no conscience. Psychopaths can look another person in the eye and lie without flinching because they have no conscience to make their lies show on their faces.
Zoloft is an antidepressant; I’ve been on it - believe me, it’s nothing like Ritalin.