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.

At the national championship race in 1985, he tested positive for Pervitin, but received no repercussions.

The head of the laboratory at Ghent University, which had administered the analysis, subsequently resigned his post in the Medical Commission of the Belgian Cycling Association (KBWB) in protest.

During the night of 15–16 February 2015, Criquielion suffered a cerebrovascular accident and he was hospitalized in critical condition.