https://www.bbc.co.uk/news/uk-england-surrey-47159315
Remember this story. It will almost certainly come to light that the accused, Darren Pencille, 36, has a history of smoking cannabis. If this is not revealed overtly, it will be hidden behind euphemisms such as ‘chaotic lifestyle’, ‘psychosis’ or ‘paranoid schizophrenia’, none of which adequately explains why a man would stab a stranger nine times on a train. His cack-handed attempt to flee and change his appearance, aided by his girlfriend, and plea of not guilty further suggest a mind unhinged by cannabis.
It is one of many stories involving someone who immigrated to the UK because it was deemed safer than the immigrant’s country of origin, in this case Russia, where the victim’s wife is from. Stories now abound of Romanians and Bulgarians practically fleeing back to their homelands. Even Somali mothers are sending their children away.
Attacker Smoked Cannabis: suicide and psychotic violence in the UK and Ireland 