Senior Constable Forte was shot as his police auto reversed into another vehicle and then flipped.
Police are now hunting the alleged killer, who is also believed to be wanted on a number of other charges.
A Special Emergency Response Team was sent to the scene at Seventeen Mile where police officer was shot.
I offer my support to the officers who are still in the field attempting to resolve this incredibly risky situation.
"Unfortunately at this time Brett Forte lost his life", south Queensland's assistant police commissioner Tony Wright told reporters.
Queensland police officer Senior Constable Brett Forte was fatally shot on Monday.
Stewart said he was a dedicated officer and a "fine son" of the state's police force.
No police officers were injured during the arrest.
Local resident Kyal Pennell, 23, who is trapped in his home due to the exclusion zone, said he could hear "non-stop bursts of automatic gunfire" and police sirens.
Police have been negotiating with the man for several hours.
No surprise: Cavs-Warriors in NBA Finals, again
Durant certainly wasn't the first player to seek an instant championship through free agency. And they've added an unbelievable player in Kevin Durant this year.
According to the Courier Mail, the man started firing at the officers after being pulled over by them.
Commissioner Ian Stewart told a press conference late on Monday night that police wanted to resolve the stand-off "as peacefully as humanly possible".
Snr Constable Forte was a member of Toowoomba's Tactical Crime Squad.
Nine said neighbours had heard gunfire coming from Maddison's property over the last couple of months.
"My thoughts are with the family, friends and colleagues. along with millions of Queenslanders, I pay tribute to his service", Mr Ryan said in his tribute.
Black Caps beaten by India in rain-affected Champions Trophy warm-up
Pakistan have never won the Champions Trophy but they reached the semi-finals in 2004 and 2009. The defending champions needed another 61 runs in 24 overs to win the practice game.
It is believed the gunman also shot at a police helicopter.
"He will never be forgotten".
The gunman remained on the run and residents had been told to stay inside as specialist police were responding.
One person was taken to nearby Toowoomba Hospital with shortness of breath.
A large area encompassing Fords Road, Forestry Road West, Sandy Creek Road, Gerard Lane, Seventeen Mile Road, Wallers Road and Forest Road is in lockdown.
Wayne Rooney rules out move to Newcastle United
A move to Everton would provide him a chance to play a starring role once again like he has done over the years for United. Mourinho selected Sergio Romero for the Europa League final ahead of De Gea.