back to Carolines interesting question.
Amongst other things I really do not think someone who had allegedly never been violent and
for sometime resisted blood sports would contemplate committing such a bloody and horrific crime, anticipate what his own physical and phsycological reaction would be and then plan to stand next to the police a very short time afterwards .
It was a complicated crime with allegedly him having a lot to do such as destroying clothes and shoes/cleaning a bike / climbing out of a window without leaving blood etc etc - working out the phone fiasco , knowing how to fake a suicide enough to convince the police. Working out how to subdue and shoot Sheila without her putting her hands up and fighting back ( that would have been a giveaway) .He had to use the right words to convince the police not to go in ( when you would have thought they would want to save the children)
This is only one of many reasons I have - I am not even sure he was bright enough to even start the planning.