Millburn, NJ — June 24, 2025, One person was killed and three other were injured in a car accident that occurred Tuesday on Brookside Dr.

According to reports, a Tesla X operated by Hannah Sun and occupied by Yuning Wang and a 3-year-old girl was traveling on Brookside Drive when for unknown reasons it was involved in an accident. The circumstances of the crash and how it occurred have not yet been made available.

When first responders arrived on the scene they found that all three occupants injured and transported them to the hospital where Wang later succumbed to her injuries. The status of Sun and the child are unknown, and officials have not released an update on the status of the investigation.

Commentary by Attorney Michael Grossman

When little is known about how a crash unfolded, it’s all the more important to focus on what hasn’t yet been examined. The lack of early detail isn’t just a gap in the story—it’s a signal that more work is needed to uncover what truly happened and why.

1. Did the authorities thoroughly investigate the crash?
With few public details and no mention of contributing factors, it's not clear whether investigators have done more than document the basic scene. A crash involving serious injury or loss of life should prompt a deeper technical review—reconstructing vehicle movement, checking for evasive maneuvers, and looking at the driver’s actions in the moments before impact. When a vehicle has multiple occupants, including a child, it's essential that every effort be made to determine how and why the incident occurred. If that process isn’t underway or hasn't been confirmed, vital insights may still be missing.

2. Has anyone looked into the possibility that a vehicle defect caused the crash?
With a Tesla involved, the vehicle’s complex systems—autopilot, driver assistance, and collision avoidance—should be reviewed carefully. Any failure in steering, braking, or sensor-driven systems could affect vehicle behavior, especially if the car was operating under partial automation. Without a detailed inspection of how those systems performed, the possibility of a malfunction remains unresolved. This is especially true when the cause of the crash has not been publicly explained.

3. Has all the electronic data relating to the crash been collected?
Teslas log an extensive amount of data. Everything from vehicle speed to lane positioning, steering input, and even camera footage is stored. That data could clarify whether the car was being manually driven, using assistance features, or responding to its surroundings correctly. Investigators should also review phone activity, GPS history, and nearby video footage to fill in any blanks. If this data hasn’t yet been accessed, the full picture of what led up to the crash remains out of reach.

When early reports offer few answers, the path forward depends on asking sharper questions. It’s not just about what’s already known—it’s about making sure that nothing crucial is left on the table.

Key Takeaways:

• Complex crashes with limited detail require thorough scene reconstruction and review of driver actions.
• Electronic system failures or automation errors should be ruled out through proper analysis.
• Tesla vehicles store critical data that can help determine exactly how the crash unfolded.