A BIZZARE twist has been revealed in the case of a Brisbane high school teacher who was allegedly held against his will before being killed in a crash on the M1.

Anthony Stott, 43, died after he was struck by a semi-trailer truck on the north-bound lane of the Pacific Mwy at 7.10am on Monday about 1km from the Cudgera Creek exit.

Mark Francis Frost, 46, and Lauren Claire Grainger, 38, from Cudgera Creek were arrested about 4pm the same day and charged with take or detain a person in company with intent to obtain advantage.

Tweed Byron Police District Acting Superintendent Brendon Cullenaddressing the media today outside Tweed Heads Police Station about the bizarre circumstances which lead to the death of a 43-year-old Brisbane school teacher Anthony Stott on Monday.
Tweed Byron Police District Acting Superintendent Brendon Cullenaddressing the media today outside Tweed Heads Police Station about the bizarre circumstances which lead to the death of a 43-year-old Brisbane school teacher Anthony Stott on Monday. Jessica Lamb

Mr Frost and Ms Grainger are not charged in relation to Mr Stott's death.

The pair were refused bail on Tuesday at Tweed Heads Police Station.

Defence lawyer Amanda Fawaz, who represented the alleged offenders, did not apply for bail.

Jessica Lamb

Their cases will return to court on Monday.

Tweed Byron Police District Detective Acting Superintendent Brendon Cullen said police will allege the couple held Mr Stott against his will by tying him to a chair at their house on Kanes Rd address prior to his death as a pedestrian on the M1.

He said Mr Stott was last seen after he flew into Brisbane Airport about 3pm on Sunday from visiting family in Sydney and had recently returned from an overseas trip.

"We believe he may have visited his home in Fortitude Valley before travelling down towards the North Coast of NSW," Dect Sup Int Cullen said.

Mr Stott's car, a silver BMW with the registration ANL72Y, was found abandoned on lane 1 of the Pacific Mwy at Cudgera Creek about 2am on Monday morning.

The car was only a short distance from the property where he is alleged to have been detained prior to his death.

An image released by NSW Police Force of Anthony Stott's BMW. Picture: NSW Police Force
An image released by NSW Police Force of Anthony Stott's BMW. Picture: NSW Police Force

Police believe Mr Stott was walking along the side of the motorway no longer restrained when he was hit by the truck and killed.

"We are appealing to members of the public to come forward if they had any interaction with Mr Stott following his arrival at Brisbane on Sunday and also if they had seen the silver BMW on the M1 or anywhere else travelling south-bound towards NSW on Sunday evening or Monday morning," Dect Supt Int Cullen said.

Teacher Anthony Stott was last seen at Brisbane Airport on Sunday afternoon. He was killed on the M1 on Monday morning. Picture: NSW Police Force
Teacher Anthony Stott was last seen at Brisbane Airport on Sunday afternoon. He was killed on the M1 on Monday morning. Picture: NSW Police Force

He confirmed it was unclear how or why Mr Stott ended up at the Kanes Rd property or what happened after he left.

Sup Int Cullen said Mr Stott appeared to be a "fine member of the public" but said all lines of inquiries were open and "we are not ruling in or out the involvement of illicit drugs".