ROMA — Texas Department of Public Safety officials didn’t know Jose Arturo Santa Cruz Cruz was a suspect in a recent slaying when they arrested him. DPS took the Mexican national into custody Sunday on a charge of unlawfully carrying a weapon and then handed the man over to U.S. Immigration and Customs Enforcement agents, said Roma police Capt. Francisco Garcia. It wasn’t until Monday morning that investigators in Roma were able to put the pieces together and identify Cruz as the prime suspect in a fatal shooting that occurred last week. Cruz, 21, allegedly shot Lauro Gonzalez several times...