A significant incident occurs during a shift, requiring immediate police involvement. Which type of report should the security guard complete *after* ensuring immediate safety and notifying emergency services?

1. A personal memorandum to their supervisor outlining only the high-level details.
2. A simple log entry stating 'Police called, incident occurred'.
3. A detailed incident report, providing all factual information gathered, including witness statements and observations, to support police investigation.
4. A report focused solely on the financial impact of the incident for insurance purposes.