EXCLUSIVESlaughtered Miss Switzerland finalists father found her head in a bin bag in her laundry room where partially pureed remains had been left while her young children played nearby unaware

The father of the slaughtered Miss Switzerland finalist found her head in a bin bag in her laundry room, where her partially pureed remains had been left by her husband, a family friend exclusively revealed to MailOnline.

Kristina Joksimovic, 38, was strangled to death, dismembered and decapitated by her husband Marc Rieben, 41, who pureed some of her remains in an industrial blender and cut out her womb.

Her remains were discovered by her horrified father on February 13, with a family friend telling MailOnline that he found a black bin bag with blonde hair sticking out in the laundry room of the large house on the gold hill of Binningen, near Basel.

When he opened the black bin bag, he saw her cut off head with the hair still attached, a family friend, who said she has known Kristinas parents and other relatives for years, said.

Kristinas father made the disturbing find after being at the house for hours, having dinner with his two granddaughters, aged three and four, and talking to Marc, who repeatedly feigned ignorance about where the former model was, according to one of Kristinas close friends.

Kristina Joksimovic (pictured), 38, was strangled to death, dismembered and decapitated by her husband Marc Rieben, 41, who pureed some of her remains in an industrial blender and cut out her womb

Pictured above is Kristinas husband Marc Reiben, who admitted to killing her, claiming self-defence

Kristinas grave features a framed photograph of the mother-of-two as well as various flowers

The loving mother often shared adorable snaps with her two daughters, aged three and four, on social media

Her remains were discovered by her horrified father on February 13, with a family friend telling MailOnline that he found a black bin bag with blonde hair sticking out in the laundry room of the large house on the gold hill of Binningen, near Basel

Her parents first got worried when they got a call from their granddaughters kindergarten, asking them to pick up the kids when their daughter failed to turn up.

When dropping them off at their home, Marc claimed he did not know where Kristina was and offered her father something to drink.

For hours, he pretended as if nothing was wrong, chatting to her father and making dinner for everyone before tucking the children into their beds. Her father went to pick up her mother and returned to the house.

Marc kept insisting he didnt know where Kristina was and claimed she would just leave sometimes.

Her mother wanted to file a missing person report with the police, but they couldnt do anything because she hadnt been missing for more than a day and Marc ended up hanging up the phone, the friend told MailOnline.

While Marc was talking to his mother-in-law, Kristinas father looked for traces of his daughter in every single room of the house.

When he reached the isolated bunker with thick concrete walls in the basement, where the homes laundry room is located, he saw a big black bin bag with strands of hair poking out.

Her mother (centre) wanted to file a missing person report with the police, but they couldnt do anything because she hadnt been missing for more than a day and Marc ended up hanging up the phone, the friend told MailOnline

When he reached the isolated bunker with thick concrete walls in the basement, where the homes laundry room is located, he saw a big black bin bag with strands of hair poking out (pictured above is the entry to the garage and basement) 

The ravaged body of model Kristina (pictured with one of her children) was found in her home in Binningen, near Basel in February

Pictured above is the home Kristina Joksimovic and her husband Marc Rieben shared with their two daughters

When he opened it and found her chopped off head inside, he ran out of the garage [door] screaming and told a passer-by to call the police, before returning to the house to confront his son-in-law, who was gobsmacked as he probably didnt think someone would find her.

When police arrived at the home and led Marc away in handcuffs, he coldly told her mother: "Well, you told me youd only come by briefly." He showed no remorse. How deranged do you have to be to not show a single emotion.

Another source, the 59-year-old family friend, told how Kristina being killed was a huge shock for the family.

Her father is strong and he is holding up somewhat, but is obviously receiving psychological treatment right now. [Her death] is tearing him apart.

She added: Her mother is totally destroyed. She is seeing a psychiatrist every day, she cant cope with it, understandably.

Kristinas close friend added: I never even know what to say to her parents. You cant console them with anything, because justice for something like this doesnt exist, no matter how long of a sentence he will get.

Last week, Marc had an appeal for release from custody rejected by the Swiss Federal Court in Lausanne - after already having his request denied at the lower court - since an ongoing investigation found there were concrete indications of mental illness underlying the case. 

Her friend told MailOnline: The last week in particular was really hard for us, her friends, after these awful details came out in court. Since she died, we have just been functioning and we have moments were all we can do is cry.

These are scars, deep scars, that will stay for the rest of our lives.-

Kristina is pictured above with her daughter while pregnant with her second

Various flowers are sitting on top of Kristinas grave in Binningen

Kristina coached the next generation of models for pageants, as well as businesswomen

Kristinas daughters wrote Mama we love you on a heart lying on her grave

Even now, dozens of pots with blooming orchids and other flowers are lining the top of the 3ft wall as well as two framed pictures of the mother-of-two

Investigators determined that Kristina had been strangled before she died, and her husband Marc later confessed to strangling his wife

Eight months after the disturbing crime, the stairs leading up to the large semi-detached house are overgrown with weeds

The models husband admitted to having killed his wife, claiming self defence

The ravaged body of model Kristina Joksimovic, 38, was found in her home in Binningen, near Basel in February

The friend said she had been friends with Kristina long before she met Marc, but wanted to stay anonymous out of fear of repercussions if he is released from custody.

If he gets out, all of us are dead in the water, especially his children, she said.

Kristinas young daughters were treated by child psychologists, who explained to them at her funeral that their mama is sleeping and isnt around anymore, according to the family friend.

Now, eight months after the gruesome killing, numerous flower tributes are still being placed outside Kristinas house and on her grave.

Also on her grave is a heartbreaking piece of art her daughters made, with writing in Serbian saying: We love you. 

The family friend revealed to MailOnline that there is an ongoing custody battle over the two children, who are understood to be cared for by Kristinas parents and her sister.

Kristinas parents are allegedly considered to be too old to take care of the young girls long-term, with their mental state also having been called into question.

Marcs sister, who lives in his home town of Bern with her family, has now applied for custody, the woman claims. The sister is supposedly supported by her and Marcs millionaire father and his fellow lawyers.

Her parents are middle class and they cant win against his familys expensive lawyers, the family friend said.

Marc RIeben, 41, (pictured right) admitted to killing and dismembering his wife Kristina Joksimovic, 38

Kristina Joksimovic was discovered in February at her upscale Binningen home in February

The overgrown staircase leading to the home in Binningen, Switzerland 

The mother-of-two married her husband in 2017 and shared posts with their children

Kristina and her husband are pictured above during their wedding day in August 2017

The alleged custody battle comes after MailOnline revealed the full details of what happened to Kristina, based on court documents.

The autopsy report shows that Kristina was decapitated when her husband dismembered her body with a jigsaw, a knife and garden shears. 

He also carefully removed Kristinas womb, which was the only organ cut out of her torso, and this deliberate mutilation or ritualised degradation of the body is believed to indicate that Marc has a mental disorder, according to the court.

Some of his wifes body parts were forced into a powerful industrial blender, in which he pureed them, as well as dissolving some in a chemical solution.

Investigators found that while cutting up the mother-of-twos body, Marc played YouTube videos on his phone. 

The autopsy found that Kristinas cause of death was strangulation, with her neck showing a reddish throttle mark.

Her body showed signs of blunt force trauma suffered prior to her death, with Kristina having cuts on her cheek, under her eyebrow and nose as well as several bruises on her right lower leg, foot, shoulder blades and on the back of her head. 

A closer examination of Kristinas head revealed wounds indicating that some of her hair was ripped out. 

The experts who analysed the dismemberment of her body said Marc used a jigsaw, a knife and a pair of garden shears to dismember Kristina, before either throwing various body parts into an industrial blender or dissolving them in a chemical solution.

Marc Rieben, 41, admitted to having killed Kristina Joksimovic (pictured), whose ravaged body was found in their home in Binningen, near Basel, on February 13

On social media, the couple often shared loved-up snaps together (like above)

Kristina regularly shared cute snaps of her family with her social media followers

Investigators found a large number of skin flaps, some with attached muscles as well as a large number of pieces of muscle, some with attached pieces of bone.

The autopsy revealed that before Marc dismembered her, he broke Kristinas hip joints out of their sockets and went on to disarticulation - which is the removal of a bone from its joint, like an amputation - with her left upper arm, forearms and right lower leg. 

He then roughly severed Kristinas upper spine to decapitate her and further split her torso in half above her pelvis.

Marc also cut out her womb, which was the only organ that was completely removed. 

While dismembering the body, he was playing YouTube videos on his phone, investigators said. 

The medical experts assumed in the autopsy report that the disposal of Kristinas body was the goal of Marcs actions, which included him hiding her phone on a delivery truck.

The court also noted that Marc, whose name was redacted in the judgement due to strict Swiss privacy laws, had refused to give them access to his phone, which investigators say is encrypted and could hide more evidence. 

The Swiss federal court said that therefore necessary environmental investigations have not yet been carried out, which it said means that there is still a considerable risk of collusion.

Describing what happened before the killing, Marc said that the couple had a positive conversation before Kristina suddenly attacked him with a knife.

He had previously claimed that he found his wife dead by the stairs in their family home, but later said that he strangled her in self-defence against the alleged knife attack.

He admitted that he dismembered her in their laundry room in a panic and pureed her with an industrial blender that he coincidentally had in his basement.

But the court said the autopsy report clearly contradicted Marcs self-defence and panic reaction claims, as his planned and systematic approach over several hours in dismembering and attempting to dispose of the body using special tools and chemicals, and in destroying and manipulating traces (injuries on the victims body) went against them. 

Model Kristina was found dead in her home in Binningen, near Basel, Switzerland, in February, with an autopsy revealing that she was strangled before being dismembered in the laundry room with a jigsaw, knife and garden shears

Kristina had once won the Miss Northwest Switzerland pageant and went on to be a finalist in the 2008 national competition

The signs of deliberate mutilation or ritualised degradation of the body, in part referring to the careful removal of Kristinas womb, were also indicating that Marc possibly had a mental disorder, the court added.

His behaviour on the day of Kristinas killing indicates that Marc is extremely violent, particularly towards his respective life partners, sometimes with sadistic-sociopathic traits.

It also revealed a low level of frustration tolerance and poor impulse control and an increasing escalation of violence, according to the court.

Marc and Kristina bought a semi-detached house in the affluent Binninger district just outside of Basel, where streets are lined with mansions and upscale newbuilds overlooking the valley. 

The couple, who got married in August 2017, lived in their spacious home with their two young daughters. 

Just four weeks before she was killed, Kristina had posted pictures of a couples getaway on her Instagram account, showing the snowy landscape from the window of a luxurious hotel above Lake Lucerne. 

To me, they seemed like the perfect family, a friend told Swiss outlet Blick.

Kristina, a Binningen native with Serbian roots, had reportedly switched from modelling to become a catwalk coach, inspiring the next generation of Miss Switzerland candidates. 

She also trained businesswomen to walk confidently in their professional or private lives. 

In her previous career, she had won the Miss Northwest Switzerland pageant in 2003 and went on to be a finalist in the 2007 Miss Switzerland competition.

The same year, she founded a coaching and consulting agency for aspiring models while still working full-time in IT recruitment.