You are a senior member of an arson investigations unit. You are being supported by newly assigned criminal investigators from a street crime unit, who don't have must experience in the investigation of arson crimes. These investigators have had training in the physical evidence collection process, but they look to you for legal guidance in terms of their presence in an arson scene. You must prepare guidelines for the new investigators to ensure that they are not violating the law and legally tainting evidence by their actions at the crime scene of an arson