What were the qualifications of the ballistics experts Stevenson hired for Hinton?

Stevenson hired three ballistics experts for Hinton. They were experts and leaders in the association of firearms and tool mark examinations. Dillon was the head of the BI in their unit for many years and the former past president for the Association of Firearm and Tool Mark Examiners. He had taught all over the country, consulted with the FBI, and consulted with the ATF. Emanuel and Cooper usually worked for the prosecution. They had worked for the U.S. military, the State of Texas, and Dallas County prosecutors regularly. The three of them had testified and examined over 2,000 cases