On December 14, 2010, Border Patrol Agent Brian Terry was shot dead by a group of suspected drug cartel along the Mexican border in Peck Canyon, northwest of Nogales, Arizona. The guns used to kill Brian Terry were traced back to Operation Fast and Furious.
In September 2011 the Attorney General of Mexico confirmed 200 murders happened in Mexico as a direct result of Operation Fast and Furious.
In May 2012 another murder connected to Operation Fast and Furious surfaced. According to a congressional report released, Mario González Rodríguez, brother of the state attorney general of Chihuahua at the time, was also murdered by guns traced back to Operation Fast and Furious. The U.S. withheld this information from Mexican authorities for eight months.
A high-powered rifle lost in the Fast and Furious program was used to kill a Mexican police chief in Jalisco state.
The LA Times reported, via Yid With Lid:
A high-powered rifle lost in the ATF’s Fast and Furious controversy was used to kill a Mexican police chief in the state of Jalisco earlier this year, according to internal Department of Justice records, suggesting that weapons from the failed gun-tracking operation have now made it into the hands of violent drug cartels deep inside Mexico.
Luis Lucio Rosales Astorga, the police chief in the city of Hostotipaquillo, was shot to death Jan. 29 when gunmen intercepted his patrol car and opened fire. Also killed was one of his bodyguards. His wife and a second bodyguard were wounded.
Local authorities said eight suspects in their 20s and 30s were arrested after police seized them nearby with a cache of weapons — rifles, grenades, handguns, helmets, bulletproof vests, uniforms and special communications equipment. The area is a hot zone for rival drug gangs, with members of three cartels fighting over turf in the region.
A semi-automatic WASR rifle, the firearm that killed the chief, was traced back to the Lone Wolf Trading Company, a gun store in Glendale, Ariz. The notation on the Department of Justice trace records said the WASR was used in a “HOMICIDE – WILLFUL – KILL –PUB OFF –GUN” –ATF code for “Homicide, Willful Killing of a Public Official, Gun.”