UPDATED Monday 12.10pm: SHOCKING details have emerged in an interview with the man who talked with a constitutional historian and political adviser Steven Harrison, several hours before he was found dead in Warwick, Queensland, after being subjected overnight to a sonic weapon by Queensland police on Monday, March 13th.

Brett Tunbridge, Queensland state organiser of the Australian Federation Party spoke with Harrison on an encrypted tablet during what police called a seige at Harrison’s residence on the Monday. Tunbridge had tried to calm the situation and when he asked police if he could mediate at the site, he was turned down. Harrison’s father was also at the seige with police and was also refused access to his son.

Tunbridge said he could understand the police reasoning for refusing access but was alarmed by the use of the sonic weapon which at one stage blasted through the tablets being used by Harrison and himself. He said the noise “nearly took my ear out”. On Wednesday Harrison shared his experiences with Chris Smith (former Sky News and 2GB host) on TNT Radio.

Tunbridge said the only gun he knew that Harrison possessed was a gel blaster gun used to shoot cans in his backyard. His son had used it with Harrison in his backyard. Tunbridge’s big question was why police, instead of trying to de-escalate the incident, turned on an acoustic weapon that appears to have driven Harrison to an early grave on Monday morning.

Tunbridge said Harrison initially ignored police after they knocked on his door on Monday night, thinking it was some sort of prank. He had a shower and then went to his bedroom. Police were responding to an anonymous report that Harrison was seen with a sawn-off shotgun. 12 hours later at 8.30am on the Tuesday, police reported him dead with a gunshot wound to the head.

“I offered the (police) Area Commander to mediate the situation because I was 100 per cent certain he (Harrison) wouldn’t harm me,” he told Cairns News. Tunbridge went on to explain that both he and Harrison had encountered the use of sonic weapons at last year’s big protest rally in Canberra in February.

He said the sound of the sonic weapon could be heard in the background of footage posted by 7News but later scrubbed. But neighbours had told a reporter from the Toowoomba Chronicle they heard the high-pitched noise.

Harrison was considered to be an expert in the area of Constitutional history and had three university degrees and thousands of books at his home. He was also an outspoken opponent of Covid lockdowns and advised the Australian Federation Party on constitutional matters. Tunbridge described him as a quiet and very devout Christian and member of the Australian Monarchist League.

The death prompted a public memorial service in Warwick last Friday at which Harrison’s sister Debbie spoke. Supporters of big protest march in Canberra also held a memorial service, Tunbridge said. When spoken to by Cairns News he said he was still in shock a week later and finding it difficult to handle the situation mentally.