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CASE: AIM-2024-0186 UPDATED: OCT 24, 2026
AUTOMATED DRIVING UNITED STATES • APR 19, 2024

Jeffrey Nissen Fatal Motorcycle Collision Involving Tesla Driving Assistance

Motorcyclist Jeffrey Nissen Jr., 28, was killed on State Route 522 in Snohomish County, Washington, on April 19, 2024. A Tesla driver admitted using automated driving assistance while looking at his phone, and Nissen’s family sued Tesla in January 2026 alleging defective safety systems.

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FATALITIES1
INCIDENT DATEAPR 19, 2024
SOURCES5
LAST UPDATED Oct 24, 2026
Causation disputed
Police documentation establishes the fatal collision and driver's admitted phone distraction while relying on automated assistance. The family alleges Autopilot/FSD product failures; no merits judgment establishing that the software caused the crash was verified. An arrest on suspicion of vehicular homicide is not a criminal conviction.

Incident overview

On April 19, 2024, Jeffrey Nissen Jr., 28, was killed when a 2022 Tesla Model S struck his motorcycle on eastbound State Route 522 near Fales Road in Snohomish County, Washington, close to Monroe and Maltby. Nissen was in slowed or stopped traffic ahead of the Tesla. The collision pinned his motorcycle beneath the car, and emergency personnel pronounced him dead at the scene. Court filings, a Washington State Patrol probable-cause affidavit and local reports establish the crash date, victim and general location.

Driver behavior and automated assistance

The Tesla driver, identified in police reports as Carl Hunter, told responding officers that he had been looking at his mobile phone while using a Tesla driver-assistance mode, commonly described in initial reports as Autopilot. He said the car lurched forward and collided with the motorcycle. Officers arrested him on suspicion of vehicular homicide based on admitted inattention and the crash circumstances. An arrest is not a conviction, and the sources reviewed here do not establish a final criminal judgment. Later reporting, including statements attributed to Washington State Patrol after data retrieval, indicated that a Full Self-Driving feature had been in use. Both Autopilot and FSD are driver-supervised Level 2 systems rather than authorization to stop watching traffic.

Evidence from police and family investigation

The Snohomish County Tribune, KIRO 7, FOX 13 Seattle and Associated Press cited the police account and documented phone distraction. These sources support the allegation that driver overreliance and inadequate attention were involved. They do not, by themselves, establish which software build operated the car, that its perception system failed to detect Nissen, or that a particular code defect was the sole cause of the fatal collision. Independently authenticated vehicle telemetry and its interpretation are therefore relevant evidence requiring caution.

Wrongful-death complaint against Tesla

In January 2026, Jeffrey Nissen Sr., acting for his son's estate, filed a civil product-liability and wrongful-death lawsuit in Snohomish County Superior Court against Tesla and the driver. The complaint, reported by KOMO and the plaintiffs' counsel, alleged that the automated-assistance system failed to respond adequately to a stopped motorcycle and that Tesla overrepresented driver-assistance capabilities. The reported civil case number is 26-2-00235-31. These are pleaded allegations, not adjudicated findings of defective design or liability.

Broader safety questions

The crash occurred after Tesla's December 2023 Autopilot-related recall intended to improve driver-engagement warnings. Families and safety researchers questioned whether driver monitoring was sufficient to prevent a distracted human from placing excessive reliance on partially automated operation. But a general recall or federal safety investigation does not prove that a specific defect caused Nissen's death. The legally material issues include driver distraction, perception of a stationary road user, braking and appropriate warnings.

Geographic and classification limits

This entry counts one fatality. The roadside location is described as eastbound SR 522 near Fales Road, within the Monroe/Maltby area, and the map uses city-level coordinates for Monroe rather than identifying the precise crash point. The AIDeaths classification records confirmed involvement of driver-assistance technology and a wrongful-death claim with disputed product causation; it does not label a police arrest as a conviction.

Key facts

CountryUnited States
TechnologySAE Level 2 Advanced Driver Assistance, Driver Monitoring and Object Detection
AI systemTesla Autopilot / Full Self-Driving (Supervised) on 2022 Model S; exact mode initially described differently in reports
Incident typeFatal rear-end motorcycle collision during reported use of Tesla driver assistance
Fatalities1
Legal statusDriver arrested on suspicion of vehicular homicide April 2024; estate filed Snohomish County Superior Court case 26-2-00235-31 in January 2026 alleging Tesla product defects; no final finding of software liability verified
Last updated October 24, 2026
Incident location State Route 522 eastbound near Fales Road, Monroe/Maltby area, Snohomish County, Washington, United States

Timeline

2024-04-19

Jeffrey Nissen killed on State Route 522

A Tesla Model S rear-ends his motorcycle in traffic near Fales Road; he dies at the scene.

2024-04-22

Police probable-cause documentation reaches press

Reports detail the driver's admitted mobile-phone distraction and reported use of driver assistance.

2024-04-24

National coverage examines partial automation

Associated Press describes the arrest, questions about attention monitoring and the distinction between Autopilot and autonomy.

2024-07-31

Later review of vehicle mode publicly reported

Reporting based on police information states that Tesla's Full Self-Driving functionality had been active.

2026-01-09

Estate brings product-liability lawsuit

Jeffrey Nissen Sr. files a civil action alleging deficient motorcycle detection, driver warnings and system design.

2026-01-11

KOMO publishes details of the lawsuit

Local journalists report the estate's claims, case context and response to the crash.

Evidence & sources

Every substantive claim should link to its supporting source. Unverified information must be identified explicitly.

Related classifications

Automated Driving Tesla Autopilot / Full Self-Driving (Supervised) on 2022 Model S; exact mode initially described differently in reports AutopilotDistracted DrivingFull Self-DrivingJeffrey NissenMonroeMotorcycle SafetyProduct LiabilitySnohomish CountyTeslaTesla Model SWashingtonWrongful Death United States Causation disputed
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