Investigators arrested 40-year-old Goulburn inmate Bassam Hamzy and charged him at Goulburn Police Station earlier today.

Investigators subsequently executed search warrants at a Glebe home, a cell within a Correctional Centre at Goulburn, and a home at Hazelbrook.

Hamzy has been charged with knowingly direct activities of criminal group, supply prohibited drug (commercial quantity), knowingly deal with proceeds of crime, and hinder apprehension person who committed serious offence.

Police will allege in court that Hamzy used legal contact calls with a solicitor to direct a syndicate involved in the supply of methylamphetamine across the state between October 2017 and October 2018.

It will be further alleged he organised payment to a man to assist him while he was wanted by police for serious firearm offences.

Hamzy represented himself when he appeared in Goulburn Local Court today by audio-visual link from Goulburn Police Station.

"I'll be suing them (police) for malicious prosecution and will be making an application for abuse of process," Hamzy said to the court.

He was refused bail.

His matter was adjourned to September 11 in Goulburn Local Court.

A 62-year-old Sydney man, Martin Churchill, who is a solicitor, has been taken to Newtown Police Station and charged with knowingly direct activities of criminal group, participate in criminal group contribute to criminal activity, take part supply prohibited drug (commercial quantity), knowingly deal with proceeds of crime, hinder apprehension person who committed serious offence, and hinder discovery of evidence re serious indictable office.

He has been refused bail to appear at Newtown Local Court today.

A 49-year-old woman, Bronwyn Brown, from Ashmont in the Riverina was also charged with participate criminal group contribute criminal activity, and supply prohibited drug (commercial quantity).

Police will allege in court that the woman supplied 400g of methylamphetamine in the Riverina region.

She was refused bail to appear at Wagga Wagga Local Court today.

Inquiries are continuing.

Detectives have arrested a Goulburn prison inmate over alleged commercial drug supply and participation in a criminal group as part of ongoing investigations into the alleged murder of a teenager from Sydney's south west.

It is believed the Goulburn inmate is Bassam Hamzy.

Police are due to address the media at 12pm today.

A Sydney solicitor has also been arrested.

In April, 2017, police were called to a home on Moresby Avenue, Glenfield, about 6.10am and found 15-year-old Brayden Dillon in bed with a gunshot wound to his head.

An investigation was launched by detectives from the State Crime Command's Homicide Squad, assisted by the NSW Crime Commission, Criminal Groups Squad, and South West Metropolitan Region, under Strike Force Wongala.

Seven people have previously been charged by investigators. They remain before the courts.

On July 3, 2019, investigators arrested a 40-year-old man, who is a prison inmate, at Goulburn Police Station.

Strike Force Wongala investigators also arrested a 62-year-old man at a home at Glebe just before 8am today (Wednesday July 3).

The older man, who is a solicitor, has been taken to Newtown Police Station.

More information as it comes to hand.

Police are urging anyone with information that may assist Strike Force Wongala detectives to call Crime Stoppers on 1800 333 000 or use the Crime Stoppers online reporting page: https://nsw.crimestoppers.com.au/ Information you provide will be treated in the strictest of confidence. We remind people they should not report crime information via our social media pages.

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