The other question I have about taking the money out of an ATM is why/how could he have her bank card? People don't have spare debit cards they keep at home. If he used her debit card then that's proof she didn't take it with her, and yet it hadn't shown up during previous searches.
I have a possible theory that he wanted it to look like Helen had removed money from her account, and he did this when he supposedly went to Majorca. It would have been easy for him to go somewhere else, where the ATM's don't have cameras (or he didn't think they did), and withdraw the money. Idea was police would believe Helen was in Croatia or something. But LE were able to prove it was him, and not Helen, withdrawing the money. As I say, just a theory. The other options is he is in serious financial difficulty, or that he'd become tired of trying to cover up and just wanted it to be over.
I have a possible theory that he wanted it to look like Helen had removed money from her account, and he did this when he supposedly went to Majorca. It would have been easy for him to go somewhere else, where the ATM's don't have cameras (or he didn't think they did), and withdraw the money. Idea was police would believe Helen was in Croatia or something. But LE were able to prove it was him, and not Helen, withdrawing the money. As I say, just a theory. The other options is he is in serious financial difficulty, or that he'd become tired of trying to cover up and just wanted it to be over.