I think what I am trying to get at is this:

Is it possible, or what are the chances, for my arrow to hit the deer that is mostly broadside, but slightly quartering away, forward and behind/into the shoulder from a 45 degree angle vertical shot (the angle my arrow traveled) with a 4 blade slick trick broadhead and not hit anything vital that would kill the deer?

It just seems weird to me that I found my arrow and immediately after I found it, the blood started looking like he began walking and stopped running. This makes me think he pulled the arrow out himself which just seems like a bad sign to me if he is that conscious enough especially after 200+ yards of hauling the mail wide open...