Ghost Ranch beaver pond ..............

I spotted something out of the ordinary in the beaver pond and moved closer for a better look.  This is what I saw.

 

The water was too deep so I had to fetch my waders and fish this whitetail buck out.

 

Not a bad buck.  I wonder what killed him?   Cats?  Blue tongue?  EHD?  Coyotes?  An arrow?   Old age?   Gun shot wound?   Horned by another buck while fighting?