His suggestion, however, runs counter to the official line of investigation being pursued by the police; that Williams died in a sex game gone wrong. However, it does fit the coroner's finding of criminal mediation in his death.
Speaking to The Sun, Sutton claimed:
"If he had been poisoned, then the chemical compounds might have vanished by the time toxicology results were conducted. If the motive for Gareth’s death was around his job then poison become much more likely."
The former detective also speculated that the suggestion that Williams' flat was "hot" when entered by police could account for a lack of toxicology results, the heat having sped up the decomposition process.