According to Bewes he was worried - he asked the police to go in as soon as they got there . And later on did he not beg them to go in saying they are all the family I Have?
So he obviously was getting increasingly worried about what had happened.
I did say Mikes theory, this is Mikes post
Hang on a minute, he told PS 'Oliver' Saxby, at the scene, upon the news that all his family had been shot dead inside the farmhouse, that 'he thought the police had shot all the victims 'dead' after they entered the farmhouse', which is consistent with my belief...