DALLAS — A man planted pipe bombs outside Dallas police headquarters and sprayed the building with bullets during a wild street battle early on Saturday that authorities said miraculously left no one dead or injured except the suspect, who was later shot and killed in his van by a police sniper. Dallas Police Chief David Brown said the suspect identified himself to authorities as James Boulware, and he blamed police for having lost custody of his son and for "accusing him of being a terrorist." But authorities declined to officially identify the suspect until a medical examiner verified it.