A woman who was kidnapped, drugged and locked in a bunker for six days by a man dubbed Sweden‘s Josef Fritzl feared she would never see the light of day again.
Isabel Eriksson, an alias used to protect her real identity, was targeted by Dr Martin Trenneborg, who gave her strawberries laced with the date rape drug Rohypnol, as part of his twisted plot in September 2015.
He then drove her 350miles from her Stockholm flat to a remote farm in southern Sweden where he planned to keep her as a sex slave.
Speaking in court in 2016, Isabel said that Trenneborg chillingly told her that the door was built like a ‘bank vault’ and she would ‘never be able to open it’.
‘Then he asked me if I had any wishes, whether he should expand the bunker, […] because I will be living here for many years,’ she added.
Now Isabel, who was working as an escort at the time, has opened up about the whole terrifying ordeal in a new documentary.
Isabel Eriksson (pictured), now 39, was targeted by evil Dr Martin Trenneborg, who gave her strawberries laced with the date rape drug Rohypnol, as part of his twisted plot
Martin Trennebourg (pictured), a doctor branded the ‘Swedish Fritzl’, was sentenced to eight years in prison for abducting Isabel and locking her in a bunker
Trenneborg’s home near Kristianstad in southern Sweden where he locked Eriksson in a soundproofed cell inside this home-made bunker
In Swedish miniseries, ‘The Bunker’, which is on streaming platform ‘Viaplay’, she explains how she suddenly woke up inside a soundproof cell with a cannula in her arm.
‘I was completely panicked. I felt powerless,’ Isabel says, adding she had no idea whether she was in an underground room or above ground.
Trenneborg, who worked as a freelance physician, is believed to have built the 60sqm bunker himself, starting in 2010.
The concrete-enforced walls were 12.5inches thick and the bunker had a bedroom, functioning toilet and a fully fitted kitchen.
It even had a small, covered courtyard, where the person living there would be able to go outside without being seen by neighbours.
Speaking in court in 2016, Isabel revealed Trenneborg made clear his intention was to keep her locked up ‘as a girlfriend’, to ‘have sex two or three times a day, clean and cook’.
‘He would come in at around half past seven in the morning, and then he would take me out in the courtyard he built.’
She described how he then left her alone in the bunker, returning after work at around six.
Trenneborg also withdrew blood and took vaginal samples from his victim which he tested at a lab in his place of work, later confessing that he did this to ensure she did not have any STDs.
‘He said that he wanted to have unprotected sex with me. I got some pills from him, it was birth control pills and he told me that he did not want me to get pregnant’, Isabel added.
Trenneborg, now 47, was eventually caught after he panicked following news reports of Isabel’s disappearance and drove her to Stockholm where they walked into a city police station.
He had told her to give detectives a cover story that she was safe and in no danger, but they became suspicious and when they questioned her alone, she revealed her terrifying ordeal.
Isabel (pictured) has also since written a book about her experience called ‘You Are Mine’
Austrian Josef Fritzl (pictured during his 2009 trial) became globally-recognised as the notorious serial rapist who held his daughter Elisabeth captive in a basement dungeon
The doctor drugged the woman using strawberries laced with Rohypnol in her flat in Stockholm, and drove nearly 350 miles to his home in southern Sweden
The kitchen in the bunker, which the man had spent five years building on his rural property
Trenneborg had hired Isabel, who was working as a £2,000-a-night escort at the time, and bundled her into his car after meeting her in Stockholm.
Although he was initially charged with rape, the trial ruled there was insufficient evidence to confirm that he had sexually attacked her, and he was convicted of kidnap and jailed for eight years.
The nature of his crime coupled with the underground bunker where he kept Isabel, earned him the nickname of the ‘Josef Fritzl of Scandinavia’.
Austrian Fritzl was jailed in 2009 for rape and murder after keeping his own daughter, Elizabeth, locked in a cellar under his home for 24 years.
Isabel revealed in a 2017 interview how she woke to see a ‘tin roof and a man sitting on a chair next to me, just looking at me’.
‘I remember that he fed me strawberries. That I do remember. It is very hard to talk about. But after that I fell asleep everything was completely black.
‘I saw a tin roof and a man sitting on a chair next to me and just looking at me. And I saw that I had a needle in my arm which I hurriedly pulled off. Then he said that he has kidnapped me and will have me locked up for a few years.
‘First when I woke up in the bunker, I tried to attack him to escape. I attacked him with two spikes but I was still sedated, so it was not a good attempt.
‘He said that if I try again he would fix me up in chains in bed and feed me only with crispbread.
‘I did not know if I’m above or below ground, it was very cold and dusty. On the stone floor there were cement bags. He say that he had built everything himself, and he was proud of what he’d done’.
The bunker also has a small covered courtyard so the person held captive could go outside without being seen by the neighbours
Police images taken inside the bunker indicated that it was still a work in progress
Police found traces of flunitrazepam – Rohypnol – on the juice and champagne bottles and the glass in the woman’s flat
Eriksson revealed in a 2017 interview how she woke to see a ‘tin roof and a man sitting on a chair next to me, just looking at me’
Eriksson spoke about the ordeal and wrote a book after escaping from Trenneborg’s lair
Eriksson went on to launch an OnlyFans page to get through her trauma – where users could pay £12 a month to see the former escort in a series of semi-naked pictures of her which she described as ‘artful’ and ‘tasteful’.
In an exclusive interview, Isabel told MailOnline last year: ‘My OnlyFans site is my way of dealing with the trauma that I am still facing even after all these years.
‘I have always been very creative and posing for these pictures which are artful and tasteful, is my way of dealing with the stress that I went through.
‘I’m not totally naked in any of the photographs, I have my underwear on, and they are no way pornographic.
‘They are beautiful, sensual photographs, which reflect my creative artistic passion, and which have helped me cope with the severe PTSD I was left with.
‘We should be proud of our bodies, and we are all a piece of art, and we are all beautiful and if you want to manifest that for yourself and others than that’s great.’
Speaking of when she met the doctor, she said: ‘He had seen my escort page advert and booked me for the night, he seemed OK at first and I had done escort work for seven years, so I know how to take care of myself.
‘He was very convincing, and he seemed normal enough, but he was the complete opposite. Every client I’d had before was fine and perfectly respectable – Trenneborg was my first and only bad experience.’
