theintercept.com/2023/01/10/tesla-crash-footage-autopilot has a link to the CHP investigation report. While not from the NHTSA it
is a government investigation report.
"P-1 claimed V-1's Full Self-Driving Capability malfunctioned at the time of the crash."
P-1 being the driver of the first Vehicle V-1.
"P-1 stated V-1 was in Full Self Driving mode at the time of the crash, I am unable to verify if V-1's Full Self-Driving Capability was active at the time of the crash. On 11/24/2022, the latest Tesla Full Self Driving Beta Version was 11 and is classified as SAE International Level 2. SAE International Level 2 is not classified as an autonomous vehicle. Under Level 2 classification, the human in the driver seat must constantly supervise support features including steering, braking, or accelerating as needed to maintain safety. If the Full Self Driving Capability software malfunctioned, P-1 should of manually taken control of V-1 by over-riding the Full Self Driving Capability feature."
"He was driving V-1 on I-80 eastbound traveling at 50 miles per hour in the #1 lane. V-1 was in Full Auto mode when V-1 slowed to 20 miles per hour when he felt a rear impact."
"On 11/27/2022 at approximately 1330 hours, I contacted P-1 via telephone to clarify his statement. He related to me in essence the following: He was driving V-1 on I-80 eastbound in Full Self Driving Mode Beta Version traveling at approximately 55 miles per hour. Prior to the Yerba Buena Island tunnel entrance V-1 moved from the #1 lane to the #2 lane. When V-1 was in the tunnel, V-1 moved from the #2 lane into the #1 lane and started slowing down unaccountably. When V-1 was about 20 miles per hour, he felt a rear impact."
"V-1 was traveling at approximately 55 miles per hour. P-1 claims V-1's Full Self Driving mode was active and malfunctioned. In any event, V-1's left signal activated, V-1's brakes activated and V-1 moved into the #1 lane slowing to a stop. P-2 observed V-1 stopping and applied V-2's brakes. V-1 made an unsafe lane change (21658(a) California Vehicle Code) and was slowing to a stop directly into V-2's path of travel. This caused the front of V-2 to collide into the rear of V-1 (A.O.I. #1). P-2 did not have enough time to perceive and react to V-1's lane change."
edited to add further quotes.