John Higgins has never been formally accused, charged or found guilty of any match fixing. Nor has there ever been suspicious betting patterns around any of his games that could have seen his integrity called into question as is pretty much always seen around true offenders like Stephen Lee, Jamie Burnett etc. In fact the WPBSA investigation found that Higgins had given a truthful account of the meeting in Kiev since he suspected mafia involvement. He was banned for failing to report an approach from men he thought were gangsters - who were really just scumbag NotW plants looking to make a story - and giving the impression that he would break the rules.
I would take Higgins word every time over that of crooked journalists who tried to ruin the guy's life. A true Scottish sporting legend.
I clocked him as well, travels with the same supporter's club as me.