[Stevvo]

I guess the gun makes you see it differently? In that, it's easier to kill someone with a gun, therefore the killer less "cold-blooded"? i.e. if the old woman had been stabbed or beaten to death rather than shot, I don't think you would take be taking issue with the term.

[zzrrt]

Yes, I think so. In a flash of emotion it’s easy to pull the trigger. A caveat I would put is that he seems to have done the shooting over a somewhat long period (I didn’t want to watch the videos closely, but maybe 30+ seconds), so maybe it’s not very “hot-blooded”, but more so than emotionless or planned killing.