This year, on this day, Gomes arrived without incident at Milford High, where he was one of 280 students to stride across the turf football field to receive their diplomas on a wind swept, sunny morning. When they called Gomes’s name, he stepped forward smiling and clapping as cheers erupted in the bleachers. During the two-hour ceremony, there was only one reference to what happened a year ago. Yago Sampaio, who had been in the car when Gomes was arrested, addressed the crowd as class president.