An East Grand Forks assistant hockey coach has been arrested and faces charges of gross sexual imposition. Philip Jason Hartwig, 46, was arrested late Friday afternoon at a business just outside of Grand Forks. An arrest warrant was issued in Ramsey County Sept. 15 on charges of gross sexual imposition, according to the North Dakota court records system. Court documents and details of what led to the charges were not available Friday evening. Hartwig remained in Grand Forks County jail Friday evening.