If you come across an obvious "crime scene", then common sense should prevail and you can always walk away BEFORE becoming an accessory after the fact. Legally, because you have signed the confidentiality agreement you are obligated 'by law' to keep all information confidential, unless you are court ordered to testify. The only time you can legally breach a confidentiality agreement is in a "eminent danger" scenario where, for example, you would come across a manifesto and bomb making equipment with clear description that they will harm others. Other than that, you keep it zipped up!.