"Mr Trimmer said the amount of ischemia discovered could not have happened in such a short space of time and were 'wholly inconsistent' with Stewart's account.
Stewart was arrested and questioned by police and gave a pre-prepared statement but refused to answer questions or offered 'no comment', Mr Trimmer said.
According to Stewart's statement: 'On that day I had left our home and when I returned a short while later I found Dianne lying unconscious on the patio.
'I went inside to get the cordless house phone and dialled 999.'
Mr Trimmer added :' There is no evidence beyond his word that in fact he left the house at all, no one saw him - both his sons were away from the house...
'In their variations and inconsistencies on such an important and life changing event, it might be though he was lying.'
[...]
"'Friends of Dianne recall his behaviour at the funeral as being unusual, ' Mr Trimer said.
The jury heard there had been various differing accounts given by the defendant about events of the morning his wife died - telling some people he had been at home, but others that he had been out shopping before returning to collect his wallet.
He told one woman, Debbie Priest, that Ms Stewart died whilst putting the washing out and that he found her slumped in the garden.
Stewart told his son, Jamie, that he had been out to Tesco and returned to find her dead."
Man who killed author Helen Bailey on trial for wife's murder