What document should a security officer create after responding to a security incident?

The most appropriate document for a security officer to create after responding to a security incident is a security incident report. This report serves as a detailed account of the event, providing critical information such as the time, location, individuals involved, actions taken, and any observations made during the incident. It is essential for documenting the specifics of the incident, which can be vital for future investigation, legal purposes, and reviewing procedures for improvement.

A summary report may provide an overview but lacks the specific details necessary for understanding the nuances of the incident. An employee evaluation is unrelated to incident documentation and focuses instead on job performance. A witness statement, while important, typically reflects the perspective of an individual present during the incident and does not provide the comprehensive analysis expected from a security incident report. Thus, the security incident report is the correct choice, as it fulfills the need for a thorough and structured documentation of security events.