The families of Steve Swan and Matthew Butler didn’t get to tell their sons’ killer exactly what they thought of him. After a Dallas County jury convicted Demarius Cummings on Thursday of capital murder with an automatic sentence of life without parole, bailiffs attempted to drag the 22-year-old man back to the courtroom to hear victim impact statements. But Cummings’ screaming and cursing as he struggled with at least four bailiffs led State District Judge Mike Snipes to declare it wasn’t safe for Cummings to return to the courtroom. The families and jurors looked horrified and nervous as they tearfully...