Johnson told reporters that police had long been aware of Jones and noted that he had made the department's strategic subject list — a list of about 1,400 people, primarily gang members, considered most likely to shoot someone or become a victim of violence. It is compiled through a computerized algorithm and includes many factors, including individuals' criminal history, especially any weapons offenses or crimes of violence; their age at their first arrest; whether the nature of their arrests escalated over the years; if they had been the intended targets of shootings or the victims of violence; and if those they've been arrested with had themselves been shot.