RICHFIELD, Minn. – The principal at Richfield High School in this south Minneapolis suburb cancelled classes after learning of an online photo of a student holding a gun with the caption, “We’re on our way.” Principal Erica Barlow recognized the student, who was wearing the school’s Spartan logo. This was about 6:30 a.m. About 8 the student showed up at the police station with his parents. The 17-year-old told police that the photo was taken in March, that the gun wasn’t real, and that someone else added the caption and posted the photo. Who? He didn’t know.