In this December 1999 file photo, Jeffrey Cookson, 36, is led from Penobscot County Jail in Bangor. Associated Press/Michael C. York

BANGOR — A judge has denied a request for new DNA testing from a man convicted in the execution-style shooting deaths of his ex-girlfriend and the toddler she was baby-sitting.

The Bangor Daily News reports 55-year-old Jeffrey Cookson is seeking a new trial for the 1999 killings in Dexter. He argues that a DNA test of hair found in his ex-girlfriend’s hand could exonerate him. Previous tests indicated the hair was not his.

The judge declined to order new tests last week, saying there was no proof the hair came from the killer.

Cookson’s attorneys are expected to appeal to the state’s high court.