As a security manager at a chemical plant, you learn that a plant executive is receiving kickbacks while dealing with a shady, toxic chemical disposal service company as a contractor for the plant....

As a security manager at a chemical plant, you learn that a plant executive is receiving kickbacks while dealing with a shady, toxic chemical disposal service company as a contractor for the plant. Two months earlier, you learned the same information from another source, and you reported your investigative findings to your superior, who stated that he would handle the situation. You are wondering why the same plant executive remains in the same job and the same shady company is still a contractor for your employer. What do you do at this point and why?