[Margaret Pilkington]

Sounds like self defence to me.
If the guy who was trying to rob this pensioner had not broken into the house, then he would still be alive today.
The man was protecting himself, his property and his elderly sick wife.
That a burglar has died means that there is one less villain on the streets to cause upset to his victims his parents and the community in general.
I cannot see how it was murder anyway, it was NOT premeditated.