Ivana was found dead on the balcony on the sixth floor of the apartment in Jalan Dang Wangi on Thursday afternoon where she had stayed with an American and his wife from Kazhakhstan on the 20th floor.
It is believed that the 19-year-old was in the apartment with a couple - an American man and his Kazakh wife - after spending a night out with them. At the time, she was clothed.
Ivana's blood tests also revealed traces of alcohol, ecstasy and amphetamines in her system.
"At about 10 a.m. she would have fallen from the balcony at 20 floors high", Smit told the Dutch news outlet.
A model plunged to her death from a 20th-floor apartment in Malaysia - following a drug-fueled night of partying with American "swingers", according to a new report.
This was following a request from the parents of Ivana Esther Robert Smit, who through the Dutch Embassy, had urged federal police to ascertain if foul play was involved in the case.
"I saw bruises on her neck, like fingerprints - as if someone had grabbed her there", he said about seeing her body in a mortuary.
Surveillance footage sees Ivana arriving at the building with the couple around 5 a.m. Thursday, according to the AD.
He continued: "She did not fall and did not jump either".
Her father, Marcel Smit, told the Dutch newspaper newspaper Algemeen Dagblad that his daughter's shoes and underwear have not been found, and that the couple who presumably last saw her alive habitually bring young models home with them.
At 7.25am, Ivana called her boyfriend, telling him she is with them and sends him a selfie, with her clothes on.
The young model was raised in Malaysia by her grandfather and was the runner-up of the 2014 Malaysia Supermodel Search. He also noted that the couple she was with did not do anything though Ivana was gone, and her possessions were left behind.
Marcel also claimed the neighbours heard shouting and arguments from the apartment unit in question that morning.
The girl's family say the investigation is going nowhere and has contacted Interpol.
"It's very odd that this American couple did nothing while Ivana's things were lying in their apartment".