There were two unlocked doors and an unlocked groundfloor window - the killer could have let himself in through any of them. I'd imagine, though, he wouldn't have expected to find an unlocked property empty of people, in which case, you'd imagine he would at least attempt to cover his face. In fact, the prosecution case tried to suggest that ATM man was wearing a balaclava under his hood.
Since their case was that he was the killer, it would seem more than a little odd that he'd not worn a balaclava in the cottage, but had donned one to hide his face when he tried to use the ATM? But if he had worn a balaclava in the cottage, Mrs Emonds could not possibly have identified him, so what was the reason for killing her?
seems rather odd that yu would take an atm card without knowing the pin number
especaily when theres cash lying about.
also seems od that he would have one go at entring the pin then throw the card away.
I mean if you've killed to killed to get the card you are not going to give up after one go.