Linda Lee Falzon’s ‘rock star’ life in suburban drug den: Accused killer claims Robbie Williams was with her the day she allegedly stabbed boyfriend James McColgan to death

A woman accused of killing her boyfriend in a suburban drug den told police rock star Robbie Williams she was with her at the time.

Linda Lee Falzon, 43, is accused of murdering James McColgan, 61, at his home in Sunbury, on Melbourne's north-west edge, where the pair lived with other addicts and dealers.

On Thursday, Falzon's bizarre claims were aired in the Melbourne Magistrates' Court, where she faces a preliminary hearing that will determine whether she faces trial in the Supreme Court of Victoria.

In a bizarre conversation with Doctor Christina Viscovi, who was brought in by police to determine whether Falzon was mentally fit to be interviewed, the alleged killer claimed the 'Rock DJ' star had been at her home when Mr McColgan died .

“You know when someone accuses you of something you're not worthy of. Robbie Williams was at my house,” Falzon told the doctor.

Falzon's lawyer Melinda Walker suggested her client had made a number of “nonsensical claims” during her arrest last November.

'You're a fish. There's a SIM card in me. They put it in me and other delusions,” Ms Walker said.

The court heard Falzon told a detective he “looked like a robot” and that Dr Viscovi “looked like her mother”.

On Wednesday, the court heard that Falzon had told people she was related to singer Justin Bieber.

Falzon is accused of stabbing a knife in Mr McColgan's chest and leaving him dead on the ground.

No motive has been established for the tattoo artist's alleged murder, while several other people have been identified as possible suspects.

Although homicide detectives agreed that Falzon was too ill at the time to be officially interviewed, they determined that she made a significant recovery after a short hospital stay.

The interview took place without input from Dr. Viscovi.

“I was not asked to complete an eligibility interview,” she told the court.

When asked whether Falzon should have been examined, the doctor could not answer.

“Honestly, it really depends on… you can make recommendations if you feel it's appropriate at the time. “I suppose an eligibility for an interview might be relevant in that situation, but if it's not asked for, an eligibility for an interview, then that's the situation,” she said.

“So if it's not asked, it's not done?” Mrs. Walker asked.

“Yes,” was the answer.

The court heard the house where Mr McColgan died was used by a Who's Who of drug-induced reprobates.

One of those people allegedly told Falzon to stab McColgan with a screwdriver.

The house had been given to Mr. McColgan by his mother and converted into a suburban cesspool where junkies gathered to sell, buy and use drugs.

The court heard Falzon had been in contact with Mr McColgan while he was homeless.

Police who visited the house after his death described it as filthy, with dirty, uncapped syringes everywhere.

Falzon's lawyer Adam Chernok said the house was littered with food scraps and the rooms were filled with “junk and debris.”

Such was the filth: an unarmed officer found Falzon in the backyard, hiding behind a discarded shopping cart.

A witness told the court that about six people and a dog were staying at the house, with at least eight people a day attending to buy drugs from a dealer who lived there.

She told the court that the people staying in the house were taking drugs and smoking both cannabis and methamphetamine.

She told the court that one of the residents once threatened to “cut her into pieces from top to bottom.”

It was known that the man went 'crazy' with a hammer and destroyed the place.

On one occasion, the man told Falzon how to commit murder in what was described as “the screwdriver incident.”

'You know what to do. Drive it. Drive it fast,” the witness said.

“I overheard a conversation between him and Mrs. Falzon.”

The hearing continues.