WITA for not letting my son say a final goodbye to his brother

My 15 year old son was murdered over 8 months ago. This was our first Christmas without him. It was so hard and my other son who just turned 14 has been holding this grudge over that I did not let him see his brother one last time when he was no longer living. I made the decision that he didn't need to see his brother. I had him cremated because he was brutally murdered and did not look like himself. He really wanted to see his brother one last time and I am still traumatized from what I saw and I don't think he would have been able to handle it and that isn't the last image I wanted him to remember his brother. We are in therapy but he still holds this grudge over me and now I wonder if I was wrong.