Steve is making copies. Lonnie, his coworker, politely asks, "When will you be done with the copier?" Steve punches Lonnie in the face. Later, Lonnie learns that Steve's last two employers fired him for punching coworkers. He also finds out that his company did not do a background check of any kind on Steve before hiring him. Would it be fair to hold Lonnie's company liable for the attack, or should Lonnie's only action be against Steve?