On February 17, 2026, I was driving my 2025 Tesla Model Y with Full Self-Driving (Supervised) engaged. While merging onto Highway 280 in Los Altos, California, the vehicle veered and crashed into the guardrail. I was not controlling the vehicle at the time — FSD (Supervised) was in control. Both of my child passengers were injured; one suffered a wrist fracture. A police report was filed at the scene. The vehicle was totaled in the crash and has not been driven since. Vehicle software at the time of the crash: 2025.45.9.1; Full Self-Driving (Supervised) v14.2.2.4. After the crash, I asked Tesla for the vehicle's driving data/logs to confirm that FSD was engaged at the time of the crash. Tesla did not provide the data. I am concerned that Full Self-Driving (Supervised) failed to safely execute a highway merge maneuver and drove the vehicle into the guardrail, resulting in injuries to my children.