more than anywhere else in the world how does the interrogation take place is an exact science. and can you trust the confessions. in the united states everything is aimed at making the suspect from the architecture of the interrogation room it's a small room that disorientate suspects and allows for physical proximity. but does it work. has definite views on this kind of police procedure. after a robust session in the interrogation room she confessed to killing her best friend on the fifteenth of april one thousand nine hundred ninety seven tiffany received

a life sentence the memories of step into the interrogation room. and he smelled the dentist smell and you hear it and you just know it's going to be a very unpleasant situation it's kind of like walking into that except there's not going to be any. you walk in there and it smells of fear it smells of pick up that lingering energy of people in there before of the depression of the. of of everything just like the atmosphere. and they said sure in their. psychological. at the time tiffany was twenty three years old prostitute she's familiar with the police and their tactics but this time she's not being picked up for soliciting for

a murder in which all the clues seem to point to her to make a confess the police will use the oldest trick in the book the good cop bad cop routine. i remember the one explicitly well madden and he was tall approximately sixty to sixty four dark complected overbearing he wore jeans a lot polo shirts and had a very cocky attitude. the other one is kind of blurry my memory of him is blurry i think he played the good cop bad was the bad cop. introducing sergeant almost seven feet tall in his socks years of experience and not the kind of cop that's easily fooled he makes new bones about his tough questioning methods it's his whole.

there is a certain amount of acting for being. for doing interviews and especially when you're in that realm as far as a good cop bad cop. so for the most part one is consoling caring you know almost. even putting off the other detective to the suspect saying you know he's he's a very mean guy he's a bad guy or whatever the case is trying to get closer with the suspect so hopefully this is suspect confides and quote unquote good cop. for me is tough going for three days how constant lying drives the interrogators to destruction. she makes up stories about her movements shifts the blame onto others and dismisses the evidence that the police don't give up. you get defensive and when you get defensive the detectives team to jump on that why are you defensive

then do you think only innocent people being attorney you thinking in terms of i say yes i need an attorney when you're saying oh you're guilty so you need an attorney is that what you're saying so it's very. it's very difficult the last interview kind of switched where i was very direct i was very accusatory and i even stormed out of the room once again some theater if you will to try to create a better atmosphere for the other detective he was very tall and very over you all the time overbearing and i can remember in trying to like get in my chair you know and maybe like i'm sick of this law i am to be this far away from my face and i'm going to. and i just start saying anything else i could say. to me claims she acted in self-defense but it's an admission that.

she never told the truth. that was that was basically the sum of it she never told the truth and even in the end so i've never told the truth. tiffany played down her part in the murder the fact she doesn't break down under the questioning of an experienced policeman shows the limitations of the good cop bad cop method. so a far less theatrical technique is being adopted that has found favor with many american police. it's an approach left tenant doleman fervently supports in july two thousand and six a murder rocks the usually quiet town of dover in new hampshire laura perkins is shot dead by have a star the woman with whom she lives from the start of

a study claims it was self-defense off the lure of stab her in the leg left on i'm told and is put in charge of a questioning. look for aether stoner laura perkins lived in the downstairs apartment heather had two children laura had basically an adopted child from a previous relationship that sometimes stay with her there two on the night in question they'd been arguing since three four o'clock in the afternoon until two morning just constant arguing while constantly drinking everybody knew that had their head shot lore the question was always going to be what are the circumstances was this a case of an abused woman protecting herself or was this a case of an angry woman killing a girl for. ever stands interrogation begins at six in the morning just a few hours off to the murder left on a dome and takes have a stone to the room set aside for the purpose

a cold stock room which meets police standards. so this is the interview room that we spoke to heather stone that morning heather was seated here. our camera was behind this this window right here. today behind bars seven years on with short looking tired she's barely recognizable she was handed a thirty year sentence off to fine me admitting she had not acted in self-defense. remarkably video of the interrogation was made available something that in most european countries would be unthinkable. has lied to the police about acting in self defense.

the police patiently let's have a present her version of events. she was born for a couple reasons one she really had an obligation to an explanation as to why her girlfriend is dead on the floor so she has a motivation to tell us something. to talk to us. because she's tired she's vulnerable because she's emotional can really is upset that this happened she's not a stone cold killer by any stretch. i don't really know what i was trying to do. part i mean part of me thought that. they'd believe me and part of me said no they won't the police believe there are certain facts that. they then turn to

a proven tactic of gaining the trust of the suspect softening her up by taking advantage of one of the vices cigarettes is seriously. if. it were and if it were but it will give. you. a good will. who are liable to get it well a little. she was surprised she was surprised that we're going to smoke in here because it's a no smoking building a no smoking facility well whatever you know you're more than welcome a small container if you're going to talk to us about this part of that just occurred i'm going to let you smoke in here they let us smoke in return for information. however tries to evade the questions something but intrigues the

police. can't. we. couldn't really explain where she was and where heather was i would be where laura was during this whole violent struggle that apparently had ensued so they were skeptical they're also skeptical because the injuries she had were minor scratches to a leg not stab wounds or big slashes but just minor cuts to the way. other claims laura made these wounds when she stabbed her. in fact it's a story suggested by joyce. a friend she called just off to the shooting joyce also helps have a change the location of the crime to add weight to her assertion she acted in self defense. she put rings on him punched me in the

face and then i cut my leg. we thought that would. get me so i wouldn't go to jail. it was a. very hard to make out. once again there was a lot that never had sex with her there's no. one.

but. one of. the people. wealthy british soil it's time to experiment. with the. markets why not. find out what's really happening to the global economy cause a report on. the diplomacy that seems to be coming from washington it appears to be just falling short of expectations of the united states as a superior negotiator as a superior diplomatic player but we see what happened in egypt after the arab

spring and the election of morsi if there was a space there where the united states could have played a critical role just assuring more and more seats on a path that would have maybe brought some advancement on some jobs economic development in that period of time the united states faltered and it's the policy ok something like that you are coming in and telling them how they should conduct i understand that in any case on the morsi thing there's not much more the u.s. could have done now in iran the u.s. is trying to start in talks with with the iranian government and yet it's getting clobbered in the middle east by the saudis who don't want to do it by the israelis or don't want to do or very good for you know good friends i want a congress that would be true to. deliberate george is on a big journey to show. one hundred twenty three days. through

to see my number top two cities of russia. really run fourteen thousand people or sixty five thousand coming. in a record setting trip by a man here to see another's face. olympic torch relay. m r g r g dot com. i believe. was held in. the police heather to provide more details and she falls into the trap when she tries to act out the scene. in the air little bit oh sure so close to doing this. i'm not going to this. she said here. actually post it. here or to.

the police want to force heavy into providing the exact details something they know full well is a nightmare for those who are lying it's ok sure is that. it helps everyone is ok so how is her a little stupid because she get my flu just. because she. doesn't see is that it's also emotional that i couldn't even really grasp their questions or even answer them i was trying to but i was lying at first so they knew this so they were trying to get it out of me and i was. the sole motional that . even their questions were like spanish to me. they should just say no to it isn't this going to do it. thank you very.

very serious dearie to. see this is the ability to. the fact that she's tired probably made it easier for us because it was it's hard to keep up a lot it's very easy to. tell the truth over and over and over again the tell the truth is the truth you just tell a story about what happened if it's the truth all you have to do is tell the truth over and over if you tell lies you have to work to tell lies you have to work to construct something that didn't happen. but after two hours of questioning the detectives know they're getting nowhere and move on to plan b. they put in the joyce the friend who suggested the self-defense ploy has confessed to everything. detective watkins and says listen joyce is already talk to us we already know everything that joyce has told us well we didn't know that joyce i had

talked to joyce she lied to me now while we're talking to heather we're reinterviewing joyce detective harrington who'd been in here is now interview enjoys but we don't know what she said we're stuck in here with have so that's a bit of that's that's quite frankly a lot. exhausted and betrayed by her own lying have finally caves in after three hours. later that year to feel better. is there that i understand. why the things i kept saying to her is she would talk about her children and she was afraid her children she would never see her children again their children will grow up without a mother and my point to her was you know what's going to look better what's going to work out better for you if you come in here and lie to us about this the death of your girlfriend or you tell us the truth.

i just figured this is it. i'm miles will just tell the truth. yet there isn't one.

they went through a lot to get the truth. i went through a lot to tell them the truth i'd told them exactly. i told them. how i remembered it. but i wasn't in the right state of mind. so i don't even remember what i told them . other says she has no regrets about having finally admitted the truth she still has twenty four years of her sentence to serve.

it's every investigator's dream to get the suspect to confess after questioning the quest for the truth is a holy grail for every policeman and investigator. and since the one nine hundred thirty s. scientists have tried to create an infallible lie detector machine or polygraph. it detects human reaction through captors placed on the arms the chest the fingers and under the bus. remember. yes or no question. were you born in the month of may. did you feel that watching the post. know. any abnormal physical reaction can be interpreted as

a sign of lining. up to find out more about polygraphs which were considered to be a form of truth serum for so many years we seek the opinion of dave brandt a florida based policeman who specializes in they use. one of the people who did research on polygraph was the guy who is better known for creating the comic books wonder woman his name was marston he was a physician and he wrote comic books on the side and what's interesting if you know anything about wonder woman one of the tools that wonder woman had was called the lasso of truth where she would put a rope around the bad guy and that caused him to have to tell the truth while the lasso of truth that he uses is literally this the blood pressure cop that we used today that goes around the subject's arm sort of a misnomer the instrument is a polygraph instrument it's recording physiological data it doesn't detect lies any

more than a cardiogram detects heart attacks it's up to me to analyze the data that i record with a polygraph instrument to determine if a person is being truthful or deceptive as you see it rise to the line that's an increase in blood pressure ok so on this question here for example this was a controlled question. this is a lie the subject answered no which is why there's a minus sign there and you'll see there's a rise in blood pressure very subtle rise in blood pressure but it's there it's clear to see when i put the line there there's a certainly an amplitude change here and also you'll see that his breathing changed from the normal respiration out here at this point he actually stopped breathing slightly during that question that's a controlled question that we know was a lie. dave brian defends the tool he uses for his work adding the majority of police departments and even the cia use the polygraph in europe however it's bad because of it's on reliable results.

steve tourism is a law professor in chicago he's an expert in interrogation techniques and has been able to obtain the freedom of several suspects on death row life sentences often their alleged confessions he's one of the polygraphs fiercest critics. they hope the person up to this machine they tell them that this machine is infallible and it's objective and it's neutral it doesn't know you this machine doesn't have the stake in whether or not you're in the center guilty. and when they fail that polygraph test or better yet when they're told they fail that polygraph test it brings them down to a place of hopelessness where it's easier to get them to confess and we have numerous cases where police officers lie about polygraph results and get innocent

people to confess. knowing the polygraph is not always dependable scientists have been urgently researching brain i and voice patterns instead so far without much success the human spirit seems capable of resisting even the most determined efforts to extract the truth. and to read a private company based in chicago that has set up a method based largely on human psychology. today it's the largest company in the world dealing with interrogation techniques staffed by former detectives it has trained almost three hundred fifty thousand police officers. the company uses videos to show the one thousand and one ways to make a suspect talk. let me ask you did you force her to have sex with you no absolutely not did you take the money from the man. a man i told you i had nothing to do with the saying ok you tell me dr. were.

read claims that offer it's training programs police officers will be able to spot lies in almost eighty five percent of cases it's a remarkable claim but despite its apparent success rate the company has turned down all requests to be interviewed it might be because of steve driza and other experts who severely condemn its theories a simplistic and it's methods as overly coercive. all the studies show that people can't conception rates better than a coin flip may be slightly better than fifty percent ok. they're leaving these trainings thinking that they can detect deception it eighty five percent that's just hogwash but it drives the interrogation in a way that it makes it much more likely that they're going to obtain false confessions. but reid has taken note of such criticism and has improved its

methodology by asking instructors to be more prudent when it comes to the signals that could be interpreted as lying nevertheless the video still teach the same controversial process of recognizing lies through body language. a deceptive suspect may orient his body away from the interviewer in a. position posture is the rigid posture suspect the so preoccupied with his deception that he appears frozen in the chair and even unable to move the purpose of an interrogation unfortunately all too often is not about getting the truth it's about getting a confession so innocence is taken off the table and then over time the interrogator will give the suspect two choices one in which the crime that the suspect committed. portrays a suspect is a monster and another path the crime is accidental and over time after his

denials are rejected over and over again the suspect will choose one of those two paths because one of those paths leads to leniency and the other one leads to greater punishment. it's a choice that allows no room for the innocent and one that frank stirling to make more than twenty years ago. dear and just. enjoy. nature. two and a half years later i got arrested for. twenty eight years old. and spent . years in prison. for

a crime i did not do. if you. start to construct your own. don't want to be bit. don't want to meet gangstas they don't want to be drug dealers they don't want that bull with all the time that the kid came to be we can see. you just meet the boaters i was like oh probably going to hook. up with thirty round clip. but i said. i don't want to die i just really do not want to die young young a. lot

of fun your whole show come on i watch n.b.c. news all the face i think i'm getting. a pleasure to have you with us here on t.v. today i'm sure.

margie dot com is launching a special project to mark the. palling scale of violence in iraq. we want you to know. we speak your language. programs and documentaries in arabic in school here on. reporting from the world talks about seventy odd p. interviews intriguing stories for you to. see in trying. to find out more visit.

tonight deadlines for the limitation of syria's chemical weapons a set but finding a country to take and destroy the talks. fall more challenging than expected. a warning for whistle blowing the u.s. hockey gets ten years behind bars off to breaking into a private company spying database which revealed the white house was keeping an eye on human rights activists nationwide. and won't back down on a promise to return all evacuees to their homes in fukushima despite a lovely radiation levels well outside the exclusion zone. this is close to the average level of the ghost town in the chernobyl zone only with one exception the place where i'm at right now more than ten thousand people are currently living.