I’m sorry about your experience and the lack of ACPD response. I would channel my feelings into contacting board members. Quite honestly, might be worth a brief appearance at the public comment period of a Board meeting. Looks like other cities have more “progressive” views on the ability to rely in video evidence.
https://www.arlingtonva.us/Government/Departments/County-Board/County-Board-Meetings
https://bikeportland.org/2015/08/25/video-leads-justice-case-dangerous-pass-caught-camera-155736
https://www.quora.com/Can-you-report-reckless-driving-if-you-have-video-footage-of-their-driving-and-their-license-plate
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