A sixteen-year-old student named Katrina Keller reportedly saw Morrison entering the school before the time specified by police. She stated that she had been walking past a vacant classroom and saw a man inside wearing a hooded sweatshirt, apparently angry. Keller did not report the incident to the school office. Other students reported that they witnessed Morrison sitting in a yellow Jeep in the school parking lot at around 10:45 a.m., almost an hour before he entered the school. Morrison was believed to have been living in the car, camping out near Bailey. Videos taken from security cameras outside show that Morrison was in his Jeep for at least 20 minutes, mingling with students as classes changed, 35 minutes before the siege began. Earlier, Morrison had spoken to a male high school student that day and "asked about the identity of a list of female students."