A judge says Wayne State University police should not have arrested a student for carrying knives that were part of his Sikh religious beliefs. Sukhpreet Singh Garcha, 23, was arrested Aug. 14 for carrying a 10-inch knife on his hip and a 5-inch knife concealed in his waistband. He was charged with violating Detroit \'s knife ordinance, which prohibits carrying knives with blades longer than 3 inches. Carrying a ritual knife known as a kirpan at all times is a basic tenet of Sikhism, an Indian-based faith with an estimated 25 million followers worldwide.