RIDDLE TIME - Walmart taking a shot at it

A muder had been suspected, but the police did not know how the man had been killed since there had been no windows no doors no chairs no desks the was only a puddle left on the floor in the mans house and the man had been hung by a rope in the middle of the floor and underneth him hangin was a puddle. how did the man reach the ceiling with no promt to get hung up on the celing and why was there a puddle?
hmmmm hes a changeling!!!! and turned huge and then back to normal and he became part puddles :D