There has been controversy of whether this attack was from a group of Los Zetas carrying on their own operation, or whether this incident was a well-planned and intentional ambush attack against the American agents. The captured individuals allegedly involved in the attack revealed through their interviews that they had mistaken the agents for a rival drug cartel. The agent's account, however, mentions that the gunmen apparently knew that they were attacking U.S. law enforcement officers, since after Zapata mentioned that they were American diplomats, the Zetas said "We don't give a [expletive]" and shot both of them. Moreover, the diplomatic plates also indicated U.S. officials were on board. Texas Congressman
Michael McCaul mentioned that the gunmen opened fire at the agents after they had identified themselves as U.S. diplomats. Five months after the slaying of Jaime Zapata, a report from the
White House noted that Zapata's family demanded to know the source of the weapons used in the attack. The gun that killed Zapata and wounded Víctor Ávila—a semi-automatic
WASR-10—was purchased by Otilio Osorio in
Dallas, Texas, the serial number obliterated, and smuggled into Mexico along with nine additional rifles. Congressional investigators have stated that Osorio was known by the
ATF to be a
straw purchaser months before he purchased the gun used to kill Zapata, leading them to question the Bureau's
Operation Fast and Furious leading to the illegal purchase and export of the murder weapon. Mexican functionaries mentioned that although their efforts have been significant, without full cooperation from the United States in preventing the drug consumption in the U.S., the flow of American weapons and of cash south of the border into the hands of the Mexican criminals, there will not be any significant improvement in dismantling the
drug cartels. On another note, the slaying of Zapata has sparked a debate on whether U.S. agents in Mexico should be allowed to carry guns to defend themselves. President
Felipe Calderón mentioned during his visit to Washington, D.C., on March 3, 2011, that "alternatives" would be examined with
Congress to improve the security of U.S. agents working in Mexico. honors the memory of Jaime Zapata through the naming of the highway between
U.S. 83 and
Bob Bullock Loop 20. ==Aftermath==