Public evidence submission portals provide the ability for the public to easily share video files from cell phones and other sources; they also present unique video authentication challenges. These challenges are often compounded by the lack of direct access to the recording device and “original” recording. How do you know that a complete and unedited video is received? How do we authenticate citizen submitted videos for admission in court? This presentation will address strategies to effectively analyze and authenticate citizen submitted video for use in investigations and legal proceedings.