You are a manager and you are to deal with a sexual harassment case at your workplace

You are a manager and you are to deal with a sexual harassment case at your workplace. This issue needs to be solved immediately otherwise it will influence the ethical culture of the whole organization. Would you take this ethical decision by your self or would you involve others in the decision making and why ?
In the answer discuss the definitions of decision making, discuss with the aid of a diagram the decision making process. The decision you make is must be ethical/acceptable.