Is it YOUR land???? I'll assume that it is since that is what you posted.
Well then start helping him live to next year by telling your brother in law about the buck, that you have seen him twice AND passed on him with the bow. You want this buck to grow another year to see what he can become.

We have a "8 Point and Outside the ears" rule that my cousins implemented on their land. Not everyone likes it, but if they want to hunt there those are the rules. Shoot anything smaller and it is a $100 fine that goes to food for the group, stand maintanence, etc. Don't pay and you are not welcome back the next year. It really makes you take a good look at a buck before pulling the trigger. If you aren't sure don't shoot. The good thing is that now we look at a buck like the one you did, and it will almost always make it another year. Hunting is much more enjoyable now and this rule has made our hunting group much tighter knit, seeing some huge rubs, or a big buck cruising doe right out of archery range.