So, is Sean Penn really a CIA agent? Body language expert reveals the truth behind El Chapo interview after studying actor during tell-all Charlie Rose chat

• e-mail

Since it was revealed that Sean Penn secretly traveled to Mexico to interview Joaquín 'El Chapo' Guzmán Loera for Rolling Stone, the actor has insisted that he had nothing to do with the drug kingpin's recapture.

Speaking to CBS 60 Minutes' Charlie Rose, Penn said his intention in tracking down the escaped drug kingpin and writing about him for Rolling Stone was to kick-start a discussion of the US government's policy on the War on Drugs.

But the public's attention has instead been focused on the fact that Penn found and met with Guzman for seven hours in a mountain hideout last October while he was still evading Mexican officials. 

He was apprehended only last week after six months on the run.

Scroll down for video 

Passionate: Speaking to CBS 60 Minutes' Charlie Rose, Sean Penn said his intention in tracking down the escaped drug kingpin and writing about him for Rolling Stone was to kick-start a discussion of the US government's policy on the War on Drugs 

Emotional: Susan Constantine, a body language expert, analyzed Penn's interview with Rose to see if the two-time Oscar winning actor is just trying to cover his tracks

She explained that throughout the interview, Penn appears to be very passionate and emotional and that she doesn't think it was an act

Susan Constantine, a body language expert, analyzed Penn's interview with Rose for Radar Online to see if the two-time Oscar winning actor is just trying to cover his tracks. 

She explained that throughout the interview, Penn appears to be very passionate and emotional and that she doesn't think it was an act. 

Constantine highlighted a point of the interview when Rose asked the Hollywood star if he was responsible for the drug kingpin's recapture with the magazine publishing his exclusive interview.

'Instead of saying yes or no he went into dialogue - a very emotional dialogue - and that's where his voice started to crack up and it became very stressed. It's a stress indicator,' Constantine told Radar Online. 

'There was a lot of emotion there and that's why the vocal chords get strained. 

'It was as if almost he was holding back tears. He's passionate about this. 

Constantine highlighted a point of the interview when Rose asked the Hollywood star if he was responsible for the drug kingpin's recapture

In regards Penn's body language for the question, Constantine said: 'There was a lot of emotion there and that's why the vocal chords get strained. It was as if almost he was holding back tears. He's passionate about this'

'You could hear it in his voice, in his body language. At points he was almost angry.'

She also mentioned that she believes that Penn was telling the truth to Rose during the interview. 

'I think he was being honest. I did not see any indicators of deception expect when he avoided the question,' Constantine told Radar.

She explained that another point in the highly anticipated interview stuck out to her as well.

'The other thing was where he was asked if he regrets that the story came out before it should have - that's when he immediately goes to his collar and scratches his neck,' she said. 

'At that point he was showing stress again. That is actually what we call a manipulator - especially the neck in this case that was showing that here was a lot of heat around it. 

'It was like very hot under the collar, very intense and he felt enormous stress after that question.'

The full CBS interview with Penn and Rose will air Sunday on 60 Minutes. 

She also said that at points in the interview Penn 'was almost angry' 

In regards to when Penn answered if he regrets his Rolling Stone story being released, Constantine said: 'It was like very hot under the collar, very intense and he felt enormous stress after that question'

According to the New York Daily News, in the CBS interview Penn said: 'I have a terrible regret.

'I have a regret that the entire discussion about this article ignores its purpose, which was to contribute to this conversation on the war on drugs.

'We all want this drug problem to stop. ... We are the consumer. Whether you agree with Sean Penn or not, there is a complicity there. And if you are in the moral right, or on the far left, just as many of your children are doing these drugs ... And how much time have they spent in the last week since this article come [sic] out, talking about that? One per cent? I think that'd be generous.

'My article has failed,' he added, explaining that it lacked discussion about drug cartels and abuse.

Mexican officials have said security forces located the whereabouts of the world's most-wanted trafficker thanks to the secret interview with the actor.

But Penn denied this when Rose asked if he thought his visit had anything to do with El Chapo's capture.

'There is this myth about the visit that we made, my colleagues and I with El Chapo, that it was -- as the Attorney General of Mexico is quoted -- "essential" to his capture,' Penn said. 'We had met with him many weeks earlier...on October 2nd, in a place nowhere near where he was captured.'

Rolling Stone magazine released its full 17-minute video interview with El Chapo days after the notorious drug lord was captured and it emerged he had met with Oscar-winning actor Sean Penn (pictured together)

CBS reported that Penn added: 'Here's the things that we know: We know that the Mexican government ... they were clearly very humiliated by the notion that someone found him before they did.

'Well, nobody found him before they did. We didn't - we're not smarter than the DEA or the Mexican intelligence. We had a contact upon which we were able to facilitate an invitation.'

The 55-year-old actor and director pointed a finger of blame for the controversy at jealous journalists who did not take kindly to being outscooped by a Hollywood celebrity.

'When you get the story that every journalist in the world wanted, there's a lot of green-eyed monsters who gonna come give you a kiss,' Penn told Rose.

He went on to say that he think the reason he succeeded in scoring a meeting with the world's most wanted fugitive was because he is not a traditional journalist.

And when quizzed on whether he now feared for his life, Penn said 'no'.

New look: New mugshots have been released of Mexican drug lord Joaquin 'El Chapo' Guzman Loera, since his recapture in Sinaloa.  Authorities have shaved his head and mustache