Everyone draws the line somewhere different. Certainly, if someone's life is in danger and I can help save them by telling a police officer who is nearby immedi

Everyone draws the line somewhere different. Certainly, if someone's life is in danger and I can help save them by telling a police officer who is nearby immediately, I'd do that. If I were in a traffic accident and I needed to call the police to document it, or I was the victim of a minor crime, I'd probably talk to them about that, too. I've gone down to the station to talk to the police about an incident report on a traffic accident. Even doing that is a risk, but it was a very minor accident and I had already agreed to pay for the damages, so it didn't seem like my exposure was high. On the other hand, if I were the victim or came across the scene of a major crime - e. g. a robbery, a murder, etc. - once any immediate danger was resolved, I would probably contact my attorney and tell them. (Your mileage may vary; not everyone has an attorney to contact right away.) It's easy to go from a bystander or victim to being the suspect. If police showed up at my home without warning, and I didn't call them, I wouldn't talk to them.