An investigation by El Universal found that between the years 2000 and 2012, the U.S. government had an arrangement with Mexico's Sinaloa drug cartel that allowed the organization to smuggle billions of dollars of drugs while Sinaloa provided information on rival cartels.
Sinaloa, led by Joaquin "El Chapo" Guzman, supplies 80% of the drugs entering the Chicago area and has a presence in cities across the U.S.

There have long been allegations that Guzman, considered to be "the world’s most powerful drug trafficker," coordinates with American authorities.

But the El Universal investigation is the first to publish court documents that include corroborating testimony from a DEA agent and a Justice Department official.

The written statements were made to the U.S. District Court in Chicago in relation to the arrest of Jesus Vicente Zambada-Niebla, the son of Sinaloa leader Ismael "El Mayo" Zambada and allegedly the Sinaloa cartel’s "logistics coordinator."

Here's what DEA agent Manuel Castanon told the Chicago court:

"On March 17, 2009, I met for approximately 30 minutes in a hotel room in Mexico City with Vincente Zambada-Niebla and two other individuals — DEA agent David Herrod and a cooperating source [Sinaloa lawyer Loya Castro] with whom I had worked since 2005. ... I did all of the talking on behalf of [the] DEA."

rest of article:

http://www.businessinsider.com/the-us-government-and-the-sinaloa-cartel-2014-1#ixzz2qOiQcfhh

Honestly this comes as no surprise, Chapo has been "on the run" for I believe over 10 years now, it's clear he's been getting assistance from north of the border.

its not exactly news that some sinaloa members are informants also most of the shocking stuff is what the lawyer of zambada is claiming, so take that for what its worth. Also a lot of sinaloa members still get arrested all the time.