Capture of the World's Most Wanted Drug Lord

Inside the final moments as Joaquin "El Chapo" Guzman is busted in a Mexican hotel raid.
3:00 | 02/23/14

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Transcript for Capture of the World's Most Wanted Drug Lord
New information coming in on the capture of that drug lord known around the world described as cruel and ruthless and wanted in Mexico -- here in the US. Tonight ABC news is learning what are the keys to tracking down Joaquin Guzman helped topple. What's his own family. Authorities had been tracking their communications messages between family members getting closer to his location. Leading to this moment right here Mexican Marines taking him to the helicopter that would take him to prison. And where did it all in for him. Inside this nondescript Mexican hotel. ABC's senior justice correspondent Pierre Thomas picking up the story from there tonight for the first time taking us inside that hotel room. It all -- here in room full. Miramar hotel not a shot prior. This grainy video released today by a Mexican authorities showing that -- room with Guzman was finally caught. He was snatched breakfast still on the stole an indication of his abrupt departure. And with that the leader of a cartel responsible for 25% of drugs entering the US and 80% of the drugs in Chicago was in custody. After thirteen years on the run this is super important symbolic capture. But look closely and has faced and capture compared to an earlier photo. According to AP analysis of this photo L chapel may have had a hair transplant and possible plastic surgery to his -- line and neck. -- -- is legendary not only for his viciousness but also his evasiveness. He narrowly escaped a week ago. Hiding in an undisclosed residents slipping out through an underground tunnel -- Mexican authorities engaged in a firefight with cartel members. But the trail stayed hot and authorities were able to pinpoint his location at the Miramar hotel 600 miles to Mexico City. He's been indicted in the US -- -- possible federal prosecution. In the number of cities including Brooklyn and Chicago. In Chicago he's public enemy number one. I would ask that the Mexicans consider. Extraditing him to the United States where he will be put in a super Max prison under tight security where he cannot escape. Here is with us now from Washington and hear what more do we know about his own family members -- messages that we're closely watched helping to lead to his hideout. David over time US and Mexican authorities got intelligence and -- -- family members were making decisions about cartel business. They started to monitor their phone calls and travels. So we're talking about a combination of technology and good old fashioned police work that led to -- chapels capture all right Pierre Thomas on the story all weekend long here thank you.

This transcript has been automatically generated and may not be 100% accurate.

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