From Mail Online:
Neighbour who Googled ‘How long for murder?’ before stabbing mother and daughter to death with a carving knife is found guilty of manslaughter on the grounds of diminished responsibility
Ralph also claimed there had been a ‘slight altercation’ between himself and Mr and Mrs Harris the evening before he stabbed them but would not elaborate.
He said Mrs Harris did not like him smoking cannabis and he wrote her a letter to apologise for ‘snapping’ at her seven months earlier.
Attacker Smoked Cannabis: suicide and psychotic violence in the UK and Ireland 