Police offer $250,000 reward for information regarding the suspicious death of Jason Guise

A $250,000 reward has been offered in a desperate big to solve the murder of a an Olympic champion’s boyfriend whose body was found in a sewage tank.

Jason Barry Guise, 45, was last seen on Charlotte Street in Wynnum, Brisbane, on April 21, 2019.

Mr Guise was dating disgraced Olympic gold medal diver Chantelle Newbery when he vanished and detectives have run out of leads. 

Police have released CCTV footage of Jason's last known movements, when he was riding a bicycle past the Waterloo Hotel on Berrima street April 21

Police have released CCTV footage of Jason’s last known movements, when he was riding a bicycle past the Waterloo Hotel on Berrima street April 21

Jason’s father, Barry Guise still holds hope he will find out what happened to his son, and still contacts the police regularly.

In 2020, Barry Guise told reporters his son ‘unfortunately’ got involved with drugs but ‘was still a good person’. 

Police are appealing for information that may lead to the conviction of those responsible for Jason’s disappearance.

Police released CCTV footage of Jason’s last known movements of him riding a bicycle past the Waterloo Hotel on Berrima street on the night of April 21. 

Footage from an earlier date shows Jason walking through a car park and putting petrol in a red vehicle, wearing a bum bag, a cap and a white t-shirt. 

The last confirmed sighting of Jason was about 7.20pm on April 21, when he visited a food truck before returning to his home on Bride street sometime after 8pm 

Jason's disappearance was out of character, he was in regular contact with his family and had upcoming life plans that he was looking forward to, police said

Jason’s disappearance was out of character, he was in regular contact with his family and had upcoming life plans that he was looking forward to, police said

Jason was reported missing by his roommate nearly two weeks later on May 2.

Due to evidence from medical examinations, police believe Jason died shortly after he disappeared and suspect there are people in the community who are withholding information. 

Maintenance workers located Jason’s body in a pit within a sewage treatment plant at Wynnum on May 8.

Police divers spent hours working to recover his body as four truckloads of liquid were pumped from the tank. 

It is believed Jason was killed in a separate location before his body was transported to the sewerage tank. 

Police have offered a $250,000 reward for information regarding Jason's suspicious death

Police have offered a $250,000 reward for information regarding Jason’s suspicious death

Earlier footage depicts Jason filling a red vehicle with petrol and walking through a car park

Earlier footage depicts Jason filling a red vehicle with petrol and walking through a car park

Due to his weight and size it is believed multiple people were enlisted to move Jason’s body to the six-meter deep tank and place his body there. 

Acting Detective Inspector Mark Mooney of the Bayside Criminal Investigation Branch called on the community to help bring justice to Jason’s family.

Mr Mooney said he wanted to make it clear that the first person that came forward with information, who was involved in the crime, but did not commit the crime would be eligible to be exempt from prosecution. 

‘Anyone involved before or after the death or during transportation, that’s who we’re looking at granting indemnity for’, he said.   

Jason’s disappearance was out of character, he was in regular contact with his family and had upcoming life plans that he was looking forward to, Mr Mooney said. 

He said police had investigated several leads, but all had ‘dried up’.  

‘The community expects these cowardly acts to be fully investigated and those offenders responsible to be brought to justice, no matter how long it takes’, he said.  

Disgraced gold medalist and ex-partner Chantelle Newbery posted an emotional tribute to Jason just hours after his body was recovered from a sewerage tank

Disgraced gold medalist and ex-partner Chantelle Newbery posted an emotional tribute to Jason just hours after his body was recovered from a sewerage tank

Newbery, posted an emotional tribute to Jason, just hours after his body was recovered from the sewerage tank in May 2019. 

‘Nooo please don’t be dead!’ the post read. 

‘I DON’T BELIEVE YOU ARE DEAD JASON! F**KIN CALL ME NOW.. TELL EVERYONE THEY ARE WRONG! LOVE YA MATE.. PLEASE BE OK..’

Ms Newbery, OAM, is a well-known diving identity who won a gold medal in the 2004 Athens Olympics but has since spiraled due to her crippling depression. 

She appeared in court with drug and stealing charges in July last year.