DeSoto police tracked the suspected shooter, Evan McMaryion, to Arizona, where he was already in custody after he was found to be driving a vehicle stolen out of DeSoto. McMaryion, a DeSoto resident, is being held in the Pinal County jail on charges of capital murder and aggravated assault with a deadly weapon. He faces extradition back to Texas. Police believe carjacking was the motive in the shooting. The shooting is the third homicide in the city in the last four weeks. DeSoto Mayor Rachel Proctor said Saturday that the shootings were isolated and disturbing, but do not represent the overall crime in the city.