The evening was overcast with a slight breeze. I had a doe show up on my Spypoint camera near my blind @3:30pm and knew it would be hard to get to my blind without spooking her. I stopped on a hill @170 yards from my blind looking down into the hardwood bottom for any sign of the doe. After glassing the bottom for 10 minutes with no sign of her I decided to head to the blind. There was no action until later in the evening. First saw the Buck at @5:15pm walking head down about 80 yards from my blind. He stopped at about 60 yards out and appeared to be scanning the bottom. At first I thought he might have picked up on my presence but he showed no sign of alert. He stood looking at my blind for well over 10 minutes without moving and I thought he had certainly picked up on me but he was still showing no signs that he was nervous or had alerted to me. As sunset approached I knew I had little time left to make this happen. He began walking down the path to the blind and stopped again about 30 yards out behind a tree. I took advantage of the tree to pull up my crossbow and disengage the safety. He walked forward another 10 yards behind another tree and stopped. I was expecting him to go left towards my camera where I had seen him many times this year however he came out behind the tree headed to the right. I let him get clear of the tree and slowly swiveled right in my chair while transitioning to my scope. I knew he was inside 20yards so i set the crosshairs right behind the shoulder a bit low in case he squatted when I fired. Fired my shot which I instantly saw from the Lumenok glowing. Perfect hit. I saw the bolt fall to the ground behind him as he bolted forward. He circled around my blinded headed for the property line but as he reached the fence he spun back towards me and went down hard behind a hickory tree that had fallen during the summer storms. I loaded another bolt and waited @ 10 minutes to be sure he was down but I was losing light very quickly and couldn't see him behind the log. He was only 50 yards away and as I stood up out of the blind with my flashlight I could see his horns.