The fatal mistake a Tesla driver made before killing 'kind and outgoing' 28-year-old in Washington

Authorities have confirmed that a Tesla on autopilot was partly responsible for a crash in Washington that killed a motorcyclist . Jeffrey Nissen, 28, was traveling about 15 miles northeast of Seattle when a Model S came from behind and rammed him off his bike before running him over. Investigators from the Washington State Patrol found the Tesla driver was operating on the company's'Full Self Driving' (FSD) and had looked at his cell phone while the vehicle was moving. Nissen was found under the car and pronounced dead at the scene, authorities reported. The 56-year-old driver was arrested for investigation of vehicular homicide.