Gasps echoed through a courtroom as a former police officer was bailed over allegations she interfered with a witness in her son's high-profile murder trial. 

Coleen Lamarre, the mother of ex-senior constable and accused double murderer Beau Lamarre-Condon, beamed into the NSW Supreme Court on Tuesday to make a bid for bail.

The 63-year-old has been charged with doing an act with the intent of perverting the course of justice over allegations she attempted to persuade a witness in her son's trial to give a false statement. She has not yet entered pleas to the charge. 

The grandmother-of-five, who also served in the force, kept a blank face as she heard she would be granted bail, but emotions ran high in the court gallery.

There were gasps as the decision was handed down, with several of Lamarre's family members crying and hugging each other. 

"Thank you," one said quietly.

Her son is set to stand trial in the same court in September.

Lamarre-Condon allegedly fatally fired his service pistol at TV presenter Jesse Baird and his flight attendant partner Luke Davies at their inner-city Sydney home in February 2024.

Prosecutors allege Lamarre-Condon bundled their bodies into surfboard bags and dumped them at a rural property in Bungonia near Goulburn.

The men's bodies were found eight days later after an extensive search. 

Lamarre-Condon, who briefly dated Mr Baird, has pleaded not guilty to their murders.

He joined the force in 2019 and was the first serving NSW police officer charged with murder in decades.

The then-senior constable was charged and eventually sacked by NSW Police after handing himself in. 

He faces two counts of domestic violence-related murder and aggravated break and enter and his case will return to court later in July. 

The proceedings have become one of NSW's most high-profile criminal cases in recent years, with suggestions hundreds of witnesses may be called to testify at trial. 

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