BOSTON (AP) – Prosecutors have dropped a child pornography charge against a former state worker who was fired over illicit content that prosecutors now say wasn’t the man’s fault.

A spokesman for the Suffolk District Attorney tells the Boston Herald that a forensic investigation of Michael Fiola’s state-issued laptop found it was hit by a virus that was the source of the pornography.

Fiola was fired as a Department of Industrial Accidents investigator in March 2007 after the child porn was found. The discovery led to a criminal charge against Fiola in August 2007. But an analyst who examined the laptop for the defense concluded spammers had bombarded the 53-year-old’s computer with porn.