Who is this murderer? ID, please

This man is wearing a cap, but more interestingly, he is wearing a smallish bag on his right hip, with the strap on his left shoulder. He has a beard and a mustache and he walks his dog while holding a flashlight/torch in his left hand. He puts the torch in his mouth to free his hand to open the gate.

(It is NOT a cigarette, dear Daily Mail.)

He is holding a package or small bag in his right hand.

He is trespassing, for starters. Then it gets worse.

WHAT did he do when he walked to the left after the attack began?

That action strikes me as something that makes this personal. Am I wrong? He walked to the front door of the house, by the looks of it. What did he do there?

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