The name 'Alain Gautier' kept recurring and soon he was linked to at least five more deaths.
Talking to other Western tourists, Knippenberg pieced together an increasingly disturbing picture.
Like this article? "insted of fixing heart of such criminal sobhraj , u could have fix heart of noble men of URnation", said another.
Even if the hired killer had been in collusion with Sobhraj, that didn't explain how he entered the prison with a gun - unless someone at the self-same prison authorities turned a blind eye.