A line from the " classic" movie Top Gun can be used here....
" The manuver was a success, but I think in this instance we are using it as an example of what NOT to do" . Plain and simple he did' nt have a shot. I think because it was his first deer with a bow.....he was probably nervous. If he had waited longer that deer may have positioned itself right for a better shot. I would say always look for a shot to the lungs or heart. There is much less of a chance of wounding a deer and setting it free. Congrats to your brother on his first deer. In the future I would' nt recomend that type of shot.
Good luck to you his season. I hope you bag a MONSTER the right way to show it and rub it in your brother' s face