I was thinking over this case last night, about 1am, as I sat outside, waiting for the temperature to drop ( it didn't ) and I got to puzzling over the money.
I do think he ( or whoever it was ) planned this event. Possibly there was a deadline looming, as in Helen starting to put changes into place ( which may have included her Will ) so he had to move fast.
So he planned and took advantage of the moment/day. All very cold and calculating.
But the money side puzzles me.
He doesn't appear to be stupid but surely he would have known that any activity on Helen's bank accounts would trigger action by the police. And whilst I think he could have made a possible excuse for taking out some money, by saying that he had a cash flow problem and bills etc had to be paid and Helen would understand ! I don't see how he could have justified taking out a large amount of cash ( to paraphrase the police ).
So my question is really, why did he have to take out a large amount of cash at that time ? Was he just stupid and greedy and didnt think the police would say anything ? or did he have an urgent need for the money which took precedence over his careful planning in every other aspect.