I'm not saying this was a bad drama but their way of killing him was just unrealistically amateur... Now seriously, who would kill him at home if they know the house got security cameras?? Why not lure him out somewhere and do it there? And if that's really the only way, at least make it seem to be self-defense or something since he's abusive anyway... It could have been more exciting if they had shown a little bit more common sense and come up with a cleverer idea imo.