This was the chilling moment Thai killer Ronnakorn Romruen showed police how he murdered a young backpacker - repeatedly smashing her face with a rock.

The 24-year-old, confessed to raping Miriam Beelte, 26, after she arrived on the idyllic island of Koh Si Chang, eastern Thailand.

The drug-crazed local pestered her for sex but when she refused, he said he followed her into the woodland and pinned her to the ground before raping her as she screamed for help.

Footage shows Romruen re-enacting the incident with a what looks like a brick, he demonstrates the attack each move at a time.

The hooded culprit is dragged by the authorities to down a corridor to a press conference while being mobbed by media.

The footage was captured today (April 8).

This is the chilling moment a Thai killer showed police how he murdered a young backpacker - repeatedly smashing her face with a rock.Ronnakorn Romruen, 24, confessed to raping blonde Miriam Beelte, 26, after she arrived on the idyllic island of Koh Si Chang, eastern Thailand. The drug-crazed local pestered her for sex but when she refused, he said he followed her into the woodland and pinned her to the ground before raping her as she screamed for help.

Romruen was arrested a few hours later and told police he deliberately murdered Miriam by repeatedly hitting her in the face with a rock to stop her from reporting the attack. He then tried to hide the blood-spattered body under leaves in a small gap between rocks.

At a police conference in Chonburi province this afternoon, Ronnakorn wore a blue bag over his head as he was paraded to the public. A police worker in a yellow t-shirt then laid on the ground as Ronnakorn demonstrated with a brick how he battered Miriam’s face until her lost consciousness.

He told police that he had taken methamphetamine at the time of the time. He then returned home and washed his clothes in a bid to hide the evidence.

Ronnakorn said he then ''smoked and watched TV'' in his shabby wooden house.

Miriam was found a few hours later just before 6pm by a local resident who alerted police and the island was sealed off.

Speaking today, Police Colonel Angkul Sarakul says in the video that Ronnakorn had confessed to the murder.

He said: ‘’This is how he did it. This is how he killed the tourist. He used a rock to hit