A woman claims she saw "a dead arm" sticking out of a barrel when a man roared up in a black ute, pointed a shotgun at her and demanded to be let into her housing estate south of Brisbane.
Police discovered a teenage girl's body inside a barrel in the back of a shot-up ute at The Lodge estate in Stapylton on Wednesday.
Officers are still hunting for the driver.
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A resident of the estate told AAP a tattooed, Caucasian man pulled up in a ute with the windows shot out and bullet holes through the bonnet, which was flipped up over the windscreen.
"He pulled out a shotgun and said to me and my partner 'I'll give you two grand if you let me in the gate right now'," the woman, who did not want to be named, said.
"We lifted up the gate and let him in."
As the car passed, she spotted a blue barrel in the tray with "an arm-flapping out".
"There was just the one barrel, it wasn't massive either, it was only small. I just seen an arm, a dead arm," she added.
Detectives are hunting for Zlatko Sikorsky, 34, and have warned the public not to approach him saying they believe he has access to guns.
The drama began at a Grassdale Street house in the Logan suburb of Buccan on Wednesday, where police were making inquiries into the disappearance of 16-year-old Sandgate girl Larissa Beilby.
Acting Detective Inspector Scott Furlong told reporters on Thursday Sikorsky and Ms Beilby knew each other.
"I don't know the relationship. We know they're associated, however we don't know the exact relationship between Larissa Beilby (and Sikorsky)" he said.
Sikorsky fled the Buccan property in a black ute but was tracked by police to The Lodge, where he dumped the car and then left in a silver 2014 Holden Commodore with Queensland registration 966 WKB.
He has distinctive tattoos around his neck, and police believe he may still be travelling in the vehicle within the Logan or Gold Coast area.
Other residents have told of seeing the hotted-up black ute coming in and out of the estate over the past fortnight.
Jacqueline and Christopher Anthony said good morning to the driver on Wednesday morning.
"He'd been staring us very intensely and now, knowing what he is and what he's done, it's very nerve-wracking and scary," Ms Anthony told reporters on Thursday.
Detectives say they're still working to identify the victim.
