Williams, 37, explained a dark-coloured auto turned left in front of her, trapping her in the intersection when her light turned red.
"Based upon this investigation and relevant Florida state statutes, no charges will be filed in this case", reads the assessment of the Palm Beach Gardens Police Department, as the local Sun Sentinel newspaper reports. As she started to cross, a dark sedan had cut her off, forcing her to stop.
The Palm Beach Police have released an 18-page report on the vehicle crash involving Venus Williams last July. The tennis star was not injured. The front end of Barson's auto collided with the right front of Williams' vehicle.
Barson received significant injuries, including a cracked sternum and broken wrist, while her husband Jerome, who was in the passenger seat, died two weeks later from injuries suffered in the crash.
Earlier this year, Williams' attorneys filed a protective order, saying they got less than 24 hours' notice that the Barson family's counsel was going to download vehicle data from the tennis star's SUV, CNN affiliate WPEC-TV in West Palm Beach reported. "I never saw that auto coming", Williams had told an officer at the scene.More news: Third graders learn importance of giving with gift to Salvation Army
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Williams has not commented publicly on the report reportedly clearing her of blame.
Williams, 37, was not impaired or distracted, according to the police report, and she was not cited at the time of the accident.
Barson was admitted to hospital with lacerations to his spleen, pelvis and spinal fractures before developing organ failure.
The official cause of death was complications involving blunt force trauma because of the accident, the medical examiner ruled.
The police had initially found Williams at fault, but found in July through surveillance footage that her claim, that she entered the intersection on a green light but got stopped midpoint after another vehicle turned left in front of her, true.