Crime scene tape marks off the area law enforcement investigators are working outside the house of a fatal shooting Thursday morning, Aug. 8, 2013, in DeSoto, Texas. A man has been arrested in the fatal shooting of four people in two Dallas-area homes, just minutes apart, and police are investigating if he used a grenade or other explosive in one of the attacks. Investigators arrested Erbie Bowser, 44, on Wednesday night at the second crime scene, DeSoto police Cpl. Melissa Franks said. Charges are pending, she said.