Terminally ill Max Bromson ended his life in Glenelg in July 2014 surrounded by family members after taking a lethal dose of an imported barbiturate.

Bromson, a Voluntary Euthanasia Party senate candidate, had said he was living with chronic pain and wanted the right to end his life peacefully at the appropriate time.

Dr Nitschke was questioned by police over the death, after saying the 66-year old used a drug that had been tested at the Adelaide laboratory of Exit International, a pro-euthanasia organisation.

SA police said in a statement in August they had competed their investigation into Bromson’s death and would not be laying any charges.

Nitschke says while police interviewed him and searched his property in Gilberton, they seized his phone, computers, monitors, documents and phials.

He says he will visit the SA police headquarters today while he is in Adelaide for a euthanasia workshop to demand they return the items.

“This property does not belong to the police or the state and they have no right to indefinitely hold these items,” he said in a statement.

Nitschke is also asking police to hand over a video Bromson told him he would take of his death to help reform Australian euthanasia laws.

“Max told me that he would be filming his death to protect his family and that he wanted the film to be given to Exit to assist in the campaign to reform the current outdated euthanasia laws that allow for police harassment of the terminally ill,” he said.

Readers seeking support and information about suicide prevention can contact Lifeline on 13 11 14 or the Suicide Call Back Service on 1300 659 467.

–AAP