A special agent for the ATF (Bureau of Alcohol, Tabacco, Firearms, and Explosives) in Colorado Springs has resigned after 18 years of service. In his resignation letter obtained by 13 Investigates, Brandon Garcia says he cannot support the way criminals are being handled by the current government. The ATF is a federal law enforcement agency within the Department of Justice. ATF has a field offices in Denver and Colorado Springs. ... Garcia, who according to his resignation letter has served in law enforcement for 18 years, has concerns about the over 5,000 ATF agents nationally. "The last time morale was...