San Antonio, TX - San Antonio authorities are investigating a video that shows a school-district officer slamming a girl to the ground.San Antonio Independent School District spokeswoman Leslie Price said that the incident at Rhodes Middle School began when two girls were arguing on March 29.The video shows an officer struggling with a girl, then picking her up and throwing her to the ground.He then cuffs her hands behind her back, pulls her to her feet and leads her away. Students appear to be asking “Janessa” if she is OK.The video, which was posted to YouTube on Tuesday, identifies the officer as Joshua Kehm and the student as a 12-year-old.Price did not identify the officer or the student, but she said the officer was placed on paid leave and that the school district was investigating.“This video is very concerning, and we are working to get all of the details,” Price told the Express-News. “We certainly want to understand what all occurred, and we are not going to tolerate excessive force in our district.”