The family of a Burton woman murdered in 2023 may find some peace after her killer was sentenced to life in prison on Monday. 26-year-old Cedric Hendrickson was found guilty last month of 20 charges in the death of 35-year-old Mallory Dunnivant, the sister of his ex-girlfriend, one of which was first-degree, premeditated murder, with other charges of assault with intent to murder, domestic violence and firearms related charges…