Animal abuse

I refer to the article 'Dog brutally beaten to death at void deck'. The dog had died after suffering from multiple head injuries and consistent trauma. Witnesses claim that the man that beat the dog to death had acted strangely as he had requested for a knife before the murder happened. Witnesses wanted to step in and stop the man from beating the dog to death but were afraid after they claimed that the man looked 'crazy'. The dog was repeatedly flung towards the floor and witnesses had rung the police, hoping that the police would reach in time to save the dog, and stop the man. Unfortunately, the dog had died soon before the police had arrived.
I feel that the man whom beat up the dog should be severely punished. The reason for beating up the dog was unknown, and thus it is most probably that the man was venting his anger on the dog, and since he looked 'crazy', he must have been a drunkard. Such brutality to an innocent animal is outrageous. In no way is the man right in beating up the dog, even if the dog had bitten him or done something to him. He could at least have told SPCA, and SPCA would have done something to do dog, maybe keep it in captivity. But no, the man just beat up the dog, flinging it to the floor multiple times, causing it to die from multiple head injuries. This is inhumane. I would not tolerate such a behavior if I were to witness such an incident outside.