A wrongful death lawsuit has been filed against Atmos Energy on behalf of Marisol and Erik Perez Jr., who were killed in the May apartment explosion in Oak Cliff. The suit alleges Atmos improperly marked gas lines around the apartment before a contractor began drilling in the area and hit one of the lines. It's the second wrongful death lawsuit filed against Atmost since the apartment explosion; in early June, a suit was filed on behalf of Sylvia Collins, who was also killed in the blast.