Do more web searching.

There is lots of information on the internet.

Some of it is even true.

Fate intervened with Pettersson. After fleeing Sweden to avoid having people yell "Killer" at him as he walked the street he was murdered in the USA over a woman. The circle of death, what goes around comes around, ...

Religious Wing Nuts thinking that their imaginary supernatural buddy told them to kill someone is the Root Cause Issue here, Christian, Moslem, Sikh, Tamil, Solar Temple, Heaven's Gate, ...

Claiming that you mistook the Swedish PM for a Drug Dealer sounds like a typical Reasonable Doubt waffle used to downgrade a  murder charge.