A young Sydney woman who chased down a home invader and flung him to the ground was not expecting her boyfriend to then slice the would-be robber’s head open with a samurai sword, a court has heard.



Police say 23-year-old Hannah Quinn screamed “What the fuck have you done?” after Blake Davis, 28, allegedly brought the weapon down on 30-year-old Jett McKee’s skull in broad daylight in Forest Lodge last Friday.



The couple subsequently hotel-hopped before handing themselves into police on Monday, according to court documents. They have both been charged with murder.



Quinn is also facing an additional charge of being an accessory after the fact to the killing of the local hip-hop artist.

Detectives allege McKee had a balaclava, replica pistol, pepper spray and knuckledusters on him when he and a “known person” drove to the inner west suburb and parked near the granny flat where Davis and Quinn lived.



The unemployed musician – whose girlfriend is pregnant – had a gambling problem, according to a police statement of facts. He had continued to play poker machines despite his parents giving him $31,000 to pay off a debt.

Megan Quinn (centre), mother of Hannah Quinn, addresses media with family and friends outside the Newtown Local Court. Photograph: Danny Casey/AAP

Police allege after McKee entered the flat, neighbours heard a male voice say: “There’s no money here.”

Davis allegedly later told family and friends he was then punched by the armed intruder.

“It is to be remembered that these were innocent people enjoying their Friday afternoon,” Quinn’s lawyer, Tom Hughes, said in Newtown local court on Thursday.

Hughes claims McKee then told the couple: “You don’t want to get hurt. I will shoot you. There’s lots more people like me who will come and shoot you. Give me any valuables.”

Hughes said Quinn, who has no criminal history, would have been “understandably terrified, traumatised ... in shock” at the home invasion, but chased and tackled McKee in the street.

When McKee was on the ground, Davis caught up and allegedly swung the sword into his head.

Police allege neighbours heard Davis later say: “Fuck, I’m going to jail.”

Hughes said Quinn did not know “Davis was so possessed” and the police claim the fact she swore in shock immediately after the alleged attack proved it was not planned.

The 23-year-old was granted bail by magistrate Margaret Quinn on the condition she report daily to police, not contact any crown witness and supply a $60,000 surety.

Both accused are due to return to court on 9 October. Davis remains in custody.