They certainly aren't great pics and aren't enough evidence to make a "kill it or leave it" decision with. But based on what I saw from the first pic I thought 3.5 years, after seeing the 2nd pic I am more convinced he is 3.5. I doubt he is older than that, but at the MOST he could be 4.5 but I really doubt that. He has the flatter quarters, swayed back and slightly protruding belly of a deer that is older than 2.5. But his face, neck and pedicles say he isn't fully mature.

Looks like a good one in the makin, watch him 2 more years and he will SCARE YOU!!!
RA