A 19-year-old man accused of killing his ex-girlfriend's mother and sister in Prince Edward County will begin his preliminary hearing in Picton on Monday.

Dean Brown, of Belleville, is charged with the first-degree murder of 46-year-old Tracy Hannah and her 14-year-old daughter, Whitney.

He is also charged with the attempted murder of his ex-girlfriend, Shannon Hannah. The two had dated for several years before the relationship ended a few weeks before the shooting.

The family members were shot in their home in Mountainview, Ont., south of Belleville, on March 12. Another teen, who was a friend of the sisters, escaped injury by hiding in a closet.

Ted Hannah, the victims' husband and father, was working an overnight shift when the shooting occurred.

Brown's preliminary hearing is expected to last several days.

With files from The Canadian Press