PITTSFIELD, Mass. — A former Adams police sergeant pleaded guilty Friday morning in Berkshire Superior Court to 10 counts of child pornography.

Alan C. Vigiard, 46, appeared before Judge Daniel Ford and pleaded guilty to 10 counts of knowlingly possessing visual material of a child depicted in sexual conduct. A single count of lasciviously posing a child in a state of nudity was dismissed at the request of the commonwealth.

Vigiard was released on personal recognizance pending sentencing, which will take place on June 22 at 3 p.m.

The veteran officer was being investigated after a folder with pornographic images was found on a CD sent to the district attorneys. Vigiard was caught viewing pornography on a police computer at the station on Oct. 29, 2009.

He was placed on administrative leave and then resigned. As of last year, he was receiving retirement benefits accrued during his service but will lose those if the retirement board determines his crimes were linked to his employment.

The investigation was conducted by state police detectives assigned to the district attorney's office and members of the Adams Police Department.