He will also face additional charges of attempting to hide a dead body and possession of a gun without a permit.
However, Dokset, who today re-enacted for police the events that led to the death of his ex-girlfriend, Roongnapa Rachsombat, 33, continues to insist it was an accident.
Police said yesterday that the Norwegian had admitted that he had pushed Ms Roongnapa, resulting in her falling down the stairs and hitting her head on the floor below.
Today, however, he told The Phuket News in an exclusive interview that there was no fall. The argument took place in a bedroom on the ground floor, he explained. She died in the bedroom and he stashed her body in the en-suite bathroom.
The argument and ensuing fight happened when he arrived home from a shopping trip and met Ms Roongnapa in the bedroom on the ground floor. She had just came out of the bathroom.
She told Dokset she wanted to break up with him. He rejected the idea and locked the bedroom door.
“Then she started punching me in the chest,” said Dokset. “I pushed her away. I was trying to protect myself.”
Ms Rungnapa fell backwards onto the floor, slamming her head on the wall as she went down.
After discovering that she was dead, Dokset said, he went out of his mind.
“I was in complete shock. Everything was a blur,” he said. “I sat there for maybe three minutes, maybe three hours. I don’t know how long it was.”
When he finally calmed down, he said, he walked out of the room and pulled a garbage bin from his parking space into the room.
He laid the bin on its side, dragged her body to it and stuffed her inside. Then he righted the bin and pushed it into the bathroom.
The next day, he covered her body with a plastic rubbish bag, taped the lid of the bin shut and locked the bathroom door.
Why, The Phuket News asked, didn’t he call the police or an ambulance, or at least report the death of Ms Roongnapa? “I was too scared,” he said.
Part of his fear stemmed from his knowledge that Ms Rungnapa had been carrying on a secret relationship with a local police officer. The couple had even had a baby together.
“I knew her boyfriend was a policeman. I was too scared to call police. I was afraid that if I told everyone the truth, they would not believe that it was an accident.”
Dokset’s relationship with Ms Rungnapa had been rocky for a year before her death, since October 2008 when, after they had been together for five years, she went to stay with her family in Surat Thani for three months.
She called him to deliver heart-sickening news, Dokset explained.
“She told me that she was going to have a baby,” he said. “But the baby was not mine.” She added that the father of the child was her police boyfriend, who was staying at Surat Thani at the time.
She asked Dokset for money to pay for an abortion but he refused, urging her to come back to the home they shared at the time, in Hua Hin.
He said he would be the father of the baby. Two of her children from a previous relationship already lived with Dokset and Rungnapa. She agreed to come back to stay with him.
She had the baby, but did not move back in with Dokset, who by now had moved to his mansion in Kata. She would, however, visit him every couple of weeks and the relationship continued on this basis until the night that Mrs Roongnapa died, after she tried to make a complete break with Dokset.
“I love her very much,” said Dokset, his cheeks wet with tears. “But from the day I covered her with a plastic bag, I blocked her from my memory. I pretended it had never happened.
“I had no plan to keep her body or dump to dump it,” he said vaguely.
Dokset appeared in the Phuket Provincial Court this afternoon. He said that he will apply for bail in order to prepare for his trial. Police would like him to be kept where he is now - locked up in Phuket Prison - while they continue gathering evidence to support the "intentional killing" charge.
Although Dokset has admitted involvement in the death of Ms Rungnapa and identified the remains in the bin as hers, police intend to continue with DNA matching tests to confirm the body’s identity 100 per cent.
Click thumbnails below for scenes of Dokset's house, the bathroom where the body was kept, and the re-enactment.