A Dallas area man has been charged with killing his ex-girlfriend and her mother at a home near Commerce. 30-year-old Tyrone Jamaal Williams is being held without bond on a charge of capital murder in the slaying of 27-year-old Nichole Elizabeth Gonzales and 51-year-old Vicki Ann Gonzales. Investigators say Nichole Gonzales and Williams were parents to two children, who were at the home but not hurt.