On May 15, 2025, at around 11:30 AM, my Tesla was involved in a collision while Full Self-Driving (FSD) was engaged. The incident occurred at the Tesla West Covina Dealership. The vehicle struck a barrier wall without any collision warning, suggesting both a failure of the sensors and FSD system. After the incident, Tesla staff directed me to their West Covina Service Center. A service advisor reviewed the dashcam footage with me and acknowledged the crash appeared to result from FSD malfunction. I was told Tesla will cover the repair. However, when I returned on May 26, 2025, I was informed that the dashcam footage was no longer available. I did not delete it and suspect it may have been removed by Tesla personnel. They also then claimed they will not cover any repairs. I have written to their legal department to formally request the video footage and any other data they have regarding the crash. Despite follow-up, Tesla has not responded or released any data. I am reporting this as a possible safety defect and mishandling of evidence. I request NHTSA investigate: The failure of Teslaâs FSD and collision avoidance system. The disappearance of crash footage after review by Tesla staff. Teslaâs lack of response to requests for data and documentation. Thank you for your attention.