WARNING: This story contains graphic details.

A man who attacked a Saint John police officer with a knife last winter has been sentenced to 10 and a half years in prison.

Corey James Clarke, 36, was originally charged with attempted murder in the Feb. 21 stabbing of Const. Jonathan Grenier at the west-side Canadian Tire, but pleaded guilty on Oct. 31 to the lesser charge of aggravated assault and several other charges.

Grenier was stabbed three times, in the neck, face and chest, while responding …