He reportedly began talking about a body on the floor which he had cut up and put into bins, police reports.
"Either I'm getting set up or I've murdered Kirby. I had a blackout, hazy memory and woke up with a body on the floor. I am scared so I just got rid," he reportedly wrote to a cousin, according to Sky News.
"I put the body in the bins down the road. I remember the bin men finding all the meat and didn't know what it was. The carpet was lifted because of the body matter."
Investigators then searched his home and found blood on the walls, a metal pole and rock (used in the murder) and stains on the mattress he continued to sleep on following the brutal murder.
"Miss Noden's family have been put through a living hell with Lowe not disclosing where he disposed of Kirby's body, and denying all knowledge in court. Lowe added to their upset by insisting that Kirby was still alive," Detective Inspector Ian Ringrose said in a statement.
"We hope today's verdict gives them some comfort in the conclusion of the case and our thoughts and sympathies are with them."
During sentencing, the judge said the man showed the "opposite of remorse".
"You must have eaten, slept, watched TV and taken your drugs next to [Noden's corpse] for several days, with two bull terriers in the same room," Justice May said.
"Dean Lowe has taken away from us something totally precious, and although we welcome this verdict and sentence, it will never replace our loss," Noden's family said in a statement.
