Note this from the Mexican article that is not included in the Reuters
piece:
___________
Information from investigations carried out by DEA inside the US revealed
that some Mexican army and marines have been collaborating with the Zetas
and the Gulf, Sinaloa and Juarez cartels. The US officer, who asked that
his name and agency not be revealed because he was not authorized to make
statements to the press, said that the premise had always been maintained
that military officers were innocent until proven guilty and in some cases,
they will be seeking extradition to the United States so that they can
collaborate with justice in the US.
Information from the US anti-drug agency indicates that, after a year and a
half of operations in US territory, arrests have been made that have led to
the capture of members of the Zetas, as well as those of La Familia
Michoacana, and the Gulf and Sinaloa cartels inside US territory.