A teenage boy accused of stabbing Brisbane businessman Greg Josephson to death at a Clayfield home while a party was underway is captured hours later on exclusive CCTV obtained by 7NEWS.

Greg Josephson, 58, was found critically injured with a stab wound upstairs at his home in Clayfield in Brisbane’s north, about 8.15pm on Thursday.

WATCH THE VIDEO ABOVE: CCTV shows the teenager accused of killing Greg Josephson

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In the CCTV, the 15-year-old can be seen behind a café in Ascot about 8pm that evening, moving bins around.

Detectives said his body had been there for hours while more than 30 teenagers partied downstairs, unaware of the crime.

Emergency crews were called to the property just after 8.30pm.

Police described the scene as “chaotic”.

Neighbour Corinne Matthews said children were visibly shaken as they realised something was wrong.

“There were a couple of girls who leaned over and said, ‘We got invited to this party and now all we want to do is go home and we’re not allowed to leave.’ They were dreadfully upset,” she said.

The teen was arrested shortly after the CCTV was captured.

Police say the 15-year-old was the one to call triple-0.

He was known to the victim and had a minor injury when taken into custody, police confirmed.

Investigators have since recovered what they believe is the murder weapon.

It’s unknown if drugs or alcohol were present at the party.

Josephson was a father of three and a successful entrepreneur.

He founded Universal Store with his brother, Michael, in 1999, but stepped down in 2018.

“It’s distressing for the family. It’s distressing for the community and for the innocent people who were at the house who had nothing to do with it,” Detective Acting Superintendent Craig Williams said.

The family moved into the Clayfield home 15 months ago.

The three-storey property, just 5km from Brisbane’s CBD, was listed for sale in May.

According to realestate.com.au, it’s worth more than $5.5 million and features six bedrooms, six bathrooms, a pool, pavilion and alfresco terraces.

“This is a tragic incident that will affect the family, the community as a whole and other young people who were at the house at the time,” Williams said.

The teen could become the first in Queensland to be tried for murder under the state’s adult crime, adult time laws.

Queensland Premier David Crisafulli would not confirm whether the teenager will be first to face trial under new state adult time adult crime laws.

“When things like this happen deep sense of remorse,” he said.

“Let courts do their job.”

The teenager had recently changed schools and is linked to two of Brisbane’s top boys’ colleges.

Counselling is being offered to students during the holidays and into next term.

The teenager’s case was briefly mentioned in Childrens Court on Friday morning, with the accused not in attendance.

No bail application was made. He is expected to return to court in September.

Police say investigations are continuing.