It's usually not very difficult to tell if a shot would have killed a deer or not, a gutshot deer will die 99% of the time! If somebody gutshot a deer, bow or gun, and trailed it to where I put it down!! It'stheirdeer!!!
IMHO that is the mostsportsman/woodsman/ethical way. I would never hunt with anybody that thought any different!! I think anybody that shoots a dead deer walking and keeps it is in the wrong!!!