Crime scene investigators face many challeges both in court and off duty. In court, they must prove what they discovered at the scene as being correct and not subject to different interpretations. The facts they find must be carefully documented, with evidence carefully tracked with who has possession at all times or the evidence could be tampered with to the detriment of the case. Off duty is a more gray area because if they come upon an accident, should they stop as they are an investigator, not a police officer. Discretion is also a huge area of responsibility as they must not reveal important information to anyone not involved in the investigation of any crime as one never knows how connections are made by other people. As a teacher, I once had an assistant principal tell a group of teachers that some teacher in a different grade had an appointment with the principal which is why he was there as a substitute. I immediately was asked by several people if I was the person because they had deduced from other information readily available that I was the person. Crime scene people also don't know where the information might travel, and therefore, must not discuss it at all.