The furious dad of a murdered British teenager confronted the killer today - screaming at him 'look at me in the eye you bastard'.

Steven Graham stared through the window of a police truck as Chaiwat Boongarin, 44, was taken back to the spot where he murdered Woramet Ben Taota, 16, in Lampang, northern Thailand, on May 6.

The businessman, who had travelled this week from his home in Eastbourne, East Sussex, wore a blue t-shirt and glasses as he approached the police car. The window was briefly lowed before Steven shouted 'scum, look at me, look at me in the eye, look at me in the eye you bastard'.

Chaiwat, wearing a bulletproof vest, was then paraded in handcuffs before being taken to the secluded spot in dense woodland where Ben was found battered to death with a weapon on Sunday morning.

Steven - shaking with rage - yelled at the killer: 'Take his mask off, I want to see his face, You're a coward. You're a coward. Fucking look at me you bastard. No, you can't look at me, you're a coward. Look, look at me. You bastard.'

As the killer was lead away, Steven shouted: 'Get in the car, you coward. hope you rot in hell.'

Steven was comforted by Ben's mother Ooy Taota, who also yelled at the killer, along with several relatives.

Speaking at the scene, Steven said: 'I just want to throttle him. He's evil. He's pure evil, scum. I hope he rots in hell. What kind of coward kills a 16-year-old boy? He's a coward.'

Ooy added: 'I cannot understand what happened. My son was a good boy, now he will never grow up. I hope the murderer dies in prison.'

Sex crimes convict Chaiwat, who was recently released from prison, was given a lengthy police interrogation before he admitted killing Ben for what he claimed was revenge over a bungled drug deal.

He made unfounded claims that Woramet Ben and his girlfriend Suraphltchaya Khamsa, 16, who is still missing, were alleged methamphetamine runners for him but they stole the substances.

The thug, who has previous convictions for sex crimes, allegedly lured Ben to a forest and then battered him to death. Suraphltchaya has not been seen since and police are still searching for her.

Ben, who has a British father and Thai mother, was found dead on May 7 with a deep wound on his head and cuts across his face. Officers found Ben's girlfriend Yam, 16, who also knew the killer after a brief search. They are now still searching for the second girl he was romantically involved with.

Chaiwat is now being remanded in custody in the Mae Tha district.

Police Major General Mongkol Sampawapol, commander of Lampang Provincial Police, said: 'The killed was angry because he believed that Ben kept drugs for himself and his girlfriends, so he hit the victim with a stick several times until he died.

'He is a criminal. He has been in prison before. He will be charged with murder.'

Police officers from the Mae Tha district said they received a report on Sunday morning that the teenager had been found dead in a grove in the Ban Than district.

Officers found in his black shoulder bag a smartphone charger and a red wallet containing his ID card and bank card. His smartphone and cash were missing, with police suggesting he could have been robbed for the gadgets and money.

Police believe Ben was killed elsewhere and dumped in the woods, as there were no signs of struggle where his remains were found. They said he had head injuries consistent with severe trauma.

They began searching for Ben's girlfriend along with the female he was involved with before later arresting Chaiwat at his nearby home.

Police said the suspect had been released from prison around eight months ago following previous convictions for sex crimes.

They claimed that Chaiwat was seen riding his black Honda Wave motorcycle without a license plate on May 6 at around 9 PM and parked it at his relative's house with a young woman they believe is Ben's girlfriend, Suraphltchaya.

The motorcycle was found by officers this morning, May 9, behind a cow shed close to the home.

Police Major General Mongkol Sampawapol added: ‘The suspect told his relative that he wanted to leave his motorcycle at their house.

‘He told them that he was looking for a rental house for his mistress. He then left the house with another motorcycle and returned the next morning.

‘After that, he rode the black Honda Wave and left it near the hut before officers found it on May 9.

‘We are still searching for the young woman and believe that she is still safe.'

Officers interviewed Ben's mother, Ooy Taota, who is understood to be separated from Ben's British father, a businessman specialising in thatched roofs who now lives back in the United Kingdom.

Ooy told police that her son had said goodbye to her on Saturday evening and said he was 'going to work with friends' but he did not give any more details to her.