Mobile, AL - A University of South Alabama student says his rights have been violated Wednesday when a campus police officer made him remove an empty gun holster from his hip."The officer took up 30 minutes of my time and did not allow my friend and me to move about freely," D.J. Parten, a junior finance student from Mobile says. Parten is the acting president of the USA chapter of Students for Concealed Carry, but was participating in another club's event when he says officers detained him."I turned around and two officers were right behind me," Parten says. "I think it's kinda interesting because I was helping to promote a campus showing of a film about censoring others for their beliefs."In a video captured by Parten during the incident, the officer asks Parten where the weapon is that is meant to go in the holster. "I don't have it," he tells the officer before asking, "Would you like a copy of the Constitution?"Parten did have a knife in his pocket. He says he reached in his pocket in order to get his phone to record the ordeal. The officer in the video asks him to remove his hands from his pockets."You've got a knife in your right pocket. I don't know if you're ever gonna draw it out. I'm not gonna take it from you, but if you keep being a smart ass, we're going to figure something out," the officer tells Parten.The national entity of the nonprofit organization, Students for Concealed Carry, organizes a nation-wide empty holster protest in which participants wear holsters on their respective campuses. The event takes place each spring in an effort to promote gun law awareness.According to Parten, this week marks the 2016 iteration of the protest.Read more www.al.com/news/mobile/index.ssf/2016/04/watch_video_of_usa_