A TWEED constable and Sydney homicide detective have been cross examined at the hearing of a former Byron Bay schoolgirl facing court for attempted murder.
Jessica Honey Fallon, 22, is facing court over the attempted stabbing murder of Murwillumbah man Michael Martin and the reckless grievous bodily harm of Edmund Manning.
It is alleged that in the early hours of April 7, 2014, Fallon entered Martin's South Murwillumbah address and stabbed him in the neck area and in the eye.
Her alleged accomplice in the murder attempt was Martin's son, 27-year-old Michael Phillip Martin.
Martin is also due to face trial in the Supreme Court over his father's subsequent murder two months later, on June 13.
Fallon appeared in person before Magistrate Jeff Linden in the Lismore Local Court on Thursday, but did not take the stand.
The Crown tendered several pieces of evidence consisting of police diary entries and interviews with Fallon during 2014 and 2015 which formed part of the investigation into Martin's murder.
Taking the stand under cross examination by Fallon's lawyer Michael Blair were Tweed constable Andrew Ross and Sydney homicide detective Sean West.
Both faced questions about their interviews with Fallon, whose utility to police was initially as an informant in the Martin murder case, but who subsequently, by her own statements to police, became implicated in the earlier attempt on Martin's life.
Mr Blair asked the officers why they had not electronically recorded a number of their interviews with Fallon, some of which where considered "informal" but notes of which have since part of the case against her.
He also asked why the officers did not formally "caution" Fallon on several occasions during interviews that she might be implicating herself, even when she was "right in the frame" as a potential accessory to murder.
He also said Fallon was offering officers an apparent "tsunami of critical intelligence", but much of it was proven completely baseless following investigations by police.
There was series of "absolutely incredible" stories told by Fallon, including a major cannabis growing operation and the theft of a $75,000 GTS sports car, and other "completely different" versions of events.
Mr Blair argued several of Fallon's stories about the night of April 7 were so outlandish, that police had "grave doubts" about the veracity of any of her claims.
One of the stories involved implicating a man named "Cory Hancock" in the April 7 assault, but she "eventually agreed" it was actually Michael Martin in an informal interview with Constable Martin.
Mr Blair said "just like Lego blocks" his client had pulled out Cory Hancock's name and inserted Martin's into her story, but all the other details remained the same.
Constable Andrew Ross's diary records, tendered in court, indicate he believed she may have "twisted her story" and he was "not sure which is the truth".
Sydney homicide Detective Sergeant Sean West was later given access to Constable Ross's notebook entries and conducted a number of interviews of Fallon at Grafton prison and at one point on a "drive around" interview in the Murwillumbah area in relation to the murder case.
Mr Blair asked both officers repeatedly why Fallon was never warned about her potential criminal liability in the attempted murder during these interviews, even after she had admitted being at the scene.
"When I went down there [to Grafton prison] I was seeking evidence about the [June 13] murder... not the [April 7] home invasion," Det Sgt West said.
"I elected not to give her a caution... to gain further evidence about the murder," he said.
Detective Sergeant West said it wasn't his intention at the time to use the information against Fallon.
During the "drive around" interview in which Fallon allegedly showed Det Sgt West a number of locations relevant to the crimes, Mr Blair contended that Det Sgt West was "leading her through it".
"She does a lot of agreeing," Mr Blair said. "There's a lot of you putting propositions to her and her readily gobbling them up."
Det Sgt West disagreed.
The hearing has been adjourned until October 19, when Fallon is expected to take the stand.
Fallon's bail application will also be heard on October 19.