An investigation into how the federal Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) became accused of intentionally allowing American firearms to get into the hands of Mexican drug cartels:

“Voth grew deeply frustrated. In August 2010, after the ATF in Texas confiscated 80 guns—63 of them purchased in Arizona by the Fast and Furious suspects— Voth got an e-mail from a colleague there: ‘Are you all planning to stop some of these guys any time soon? That’s a lot of guns…Are you just letting these guns walk?’

“Voth responded with barely suppressed rage: ‘Have I offended you in some way? Because I am very offended by your e-mail. Define walk? Without Probable Cause and concurrence from the USAO [U.S. Attorney’s Office] it is highway robbery if we take someone’s property.’ He then recounted the situation with the unemployed suspect who had bought the sniper rifle. ‘We conducted a field interview and after calling the AUSA [assistant U.S. Attorney] he said we did not have sufficient PC [probable cause] to take the firearm so our suspect drove home with said firearm in his car…any ideas on how we could not let that firearm “walk”‘?”