Criquielion was well placed to win a medal in the 1988 world road race championship in Belgium. However, he crashed in sight of the line when another competitor, Steve Bauer of Canada, clashed with him. The third rider, Maurizio Fondriest, went on to win. Bauer was disqualified and Criquielion sued Bauer for assault, asking for $1.5 million in damages in a case that lasted more than three years before the judge ruled in Bauer's favor.
From 2006 until his death Criquielion was an alderman for the liberal MR in Lessines.
In the night of 15 to 16 February 2015, Criquielion suffered a cerebrovascular accident and he was hospitalized in critical condition. Criquelion died at 9:00 AM on 18 February 2015 in a hospital in Aalst.