Former Australian soldier Dane Andrew Pilcher has been found guilty of murdering his ex-partner Corinne Henderson after harrowing audio and visual footage was played to the jury during a two-week trial.
A recording of an emergency call made by Pilcher reveals him saying: "I've killed my partner, my ex-partner."
"I'm pretty sure she's dead, yeah," he said in the shocking tape, reports news.com.au.
The chilling call proved a key part of the case alongside police body camera footage showing a devastating scene inside Henderson's Townsville apartment where she died in September 2015 after being stabbed 21 times with a kitchen knife.
The jury found Pilcher guilty by unanimous verdict after four hours of deliberations.
The jury heard how on the night of 26 September 2015, Pilcher got a text message from a former colleague showing Henderson with her new boyfriend, Dwayne Wickham at the races.
Pilcher then sent the photo to his friend Karyn Gillham with the message "Kill them both" the Courier Mailreports.
She said asked if he was OK; Pilcher replied "This is going to happen".
Pilcher later walked up to Henderson's third floor apartment where she was with Wickham and entered after kicking in the kitchen window, Cowen said.
Henderson told Wickham to hide in the bathroom while she offered to take Pilcher to hospital for a cut on his arm that was bleeding.
In the minutes afterwards, she was fatally stabbed in the face and neck. Police footage shows Wickham being removed from the property after being assured Pilcher is gone, the ABC reports.
Pilcher had pleaded not guilty to murder and his defence counsel claimed his actions were self-defence, accident and provocation.
He said he was "infatuated" with his former girlfriend after they met on a fly-in, fly-out mining job in 2013.