[burley]

do circles around the last blood but I'd first find someone that can track well and knows what they are looking at in the way of blood.

+1 and if you are having trouble, get down on hands and knees and go slow and mark the found blood with whatever you can (tape, arrows, sticks broken to 90 deg, etc)
I have lost one deer in over 25 years. My fault. Was a bad shot (too far forward on the shoulder) and he swam across the Osage river in Mo. We had tracked him a 1/4 mile and he had turned and went to the water. My uncle took a boat across and tried to pick up a trail but never could.