"You cannot allow fear of being biased to paralyze the execution of your duties. You still have cases to investigate. You can prevent the influence of bias by following your policy and training. You must create a solid investigative plan based on solid foundational principles and investigative techniques. This means that you are listing every avenue of investigation in your plan, following up on every lead, and corroborating the statements of both parties.
You must conduct a thorough investigation and follow through on every investigative step prior to making a determination."