Family of man with schizophrenia who killed parents say it was preventable

Hospital staff did not notice William Warrington had escaped for two hours and then did not report him as dangerous

The family of a man with paranoid schizophrenia who stabbed his parents to death after absconding from a psychiatric hospital have criticised the authorities for not doing more to protect them.

On the day before William Warrington carried out the killings on his mother, Valerie, 73, and father, Clive, 68, the family sent 11 emails to the Gloucestershire hospital where he was being treated expressing concern about him.