Prosecutors found insufficient evidence to charge Tyson or Echeverria, spokesman Frank Mateljan said. The two men were arrested November 11 after an incident in which each claimed they were struck by the other.
Echeverria said Tyson knocked him to the ground, and he was treated for a cut to the forehead. Tyson was traveling with his family when he was mobbed by photographers.
His attorney Shawn Chapman Holley said at the time that Tyson was protecting his infant daughter after Echeverria collided with her stroller.
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