A Spring Hill mother is upset after her 15-year-old son was assaulted on Spring Hill High School's campus earlier this month. According to the victim's mother, Haley Pipkin, the alleged attacked occurred behind the high school on January 17. She added that her son suffered a serious head injury in the incident. In a cell phone video shot by a student, the high school freshman is reportedly punched in the face by an 11th grader multiple times and kneed in the head. "It hurts not being able to protect your children," Pipkin said. "Basically my son is on the ground. As a mother, watching it was horrible."Pipkin told Nashville's News 2 Investigates the attack against her son was unprovoked and vicious. "He thinks he blacked out. He doesn't remember going from the school to my mom's house," she said, adding, "We took him to the E.R. He suffered a concussion."According to Pipken, the alleged student responsible for the attack was only given a three day suspension despite the high school having a zero tolerance policy. In the school's handbook, it clearly states an assault on a school resource office, school employee or student will result in alternative school for one calendar year. Pipken said she has challenged the school's principal regarding the punishment. "It is not justice. What kind of message are we sending that we allow someone to assault our child in school?" she questioned. Pipken added the student has since returned to school and that her son no longer wants to go to school. "He said, ‘I can't go to school mom. I can't go.' My big fear is you hear so many kids saying they can't take it and they take their own life," she said. Nashville's News 2 Investigates called the principal of Spring Hill High School, however the calls remain unreturned. Messages left for Director of Schools Eddie Hickman also remained unreturned. "I want them to uphold their policies and procedures. I want them to do what they would want done for their children," Pipken said. Pipkin added that a warrant has been sworn out against the other student. The case will go to court later this month.