All evidence issues to the side, safety first. That's how you secure the scene when you first arrive. You have to preserve the evidence. No one comes into the crime scene unless they are doing a report. Photography also needs to happen as soon as possible. You are the investigator; you have to take control over the scene. The crimes that were committed was robbery as well as theft considering he opened the register and emptied out the contents. No I do not feel it changes the way you preserve and process the scene