The Stockton Unified School District is investigating after video released Thursday shows a Marine tackling high school students who were fighting.The fight between two students happened Wednesday at Edison High School in Stockton. The video shows the two students throwing punches at each other before the Marine, Josue Valdez Sarmiento, sprints toward the pair and knocks the two students to the ground.Stockton Unified is aware of the student matter that took place on 9/11/19 at Edison High School and the recording circulating on social media. We are actively investigating the situation,“ the Stockton Unified School District said in a statement.