You didn't notice any jingle bells or maybe a red nose? If not, then that deer was walking on the ground, leaving prints just like footsteps in the sand. Find his prints, and track the DEER, not just his blood. It will be harder after the rain, and all the other people tramping about, but follow where he went. watch for pushed grasses, transfer on brush, wounded deer often run toward water, or hide. If he crosses a fence, his prints will be deeper from jumping and landing, watch for transfer of hair on fences. Follow his path and hang markers in plain sight to show direction (this will give you an idea where to look for more sign or destination) if you lose the trail mark the end with a pole or a light( a marker of some kind) and spiral out to see if he changed direction, or to pick up more sign. Have more than one tracker locking for different sign, tracks, blood, hair, grasses, because you may tunnel vision and miss some thing. Never accept only one type of tracking, but use them together. if you see blood, look for prints, hair ect , if you see prints look for more (An over view approach) and combine all you clues for a total picture. It will become more natural as you do it. Let us know how it pans out.
The only real difference between a good tracker and a bad tracker is observation. All the same data is present for both. The rest is understanding what you are seeing.