Goulburn supermax prisoner Bassam Hamzy has told a court police are out to get him after he was charged over an alleged drug supply ring uncovered during an investigation into the murder of a 15-year-old.

Key points: Brayden Dillon, 15, was shot in the head while he was in bed on Good Friday, 2017

Brayden Dillon, 15, was shot in the head while he was in bed on Good Friday, 2017 Hamzy was taken to Goulburn police station this morning

Hamzy was taken to Goulburn police station this morning His solicitor and another woman have also been arrested

Homicide detectives involved in the ongoing investigation into the execution-style killing of Brayden Dillon on Good Friday in 2017 allege Hamzy ran the drug operation from his prison cell.

Detective Acting Superintendent Mark Henney said police would allege Hamzy was directing the operation through confidential communications with his solicitor Martin Churchill.

"This investigation has uncovered the abuse of the client-solicitor communication in order to organise criminal activities," he said.

"Particularly the supply of drugs outside the prison complex."

Hamzy, 40, denied the allegations when he briefly appeared in Goulburn Local Court via videolink on charges of directing a criminal group, commercial supply of methamphetamine, dealing with proceeds of crime, and hindering the apprehension of another.

Dressed in orange prison overalls, Hamzy told the court he had been charged because the police were out to get him.

He said the charges were an abuse of process and he intended to sue for malicious prosecution.

He was formally denied bail and will return to court in September.

Murder probe led to drug ring

Mr Churchill, 62, was arrested at a unit in Glebe and is being questioned at Newtown police station.

A 49-year-old woman was arrested at Ashmont in Wagga Wagga in connection with the same alleged syndicate.

They are yet to be charged.

Brayden Dillon was shot dead in his home in 2017. ( Supplied: NSW Police )

The group will be accused of supplying 400 grams of methamphetamine over a 12 month period in NSW's Illawarra and Riverina regions.

It is understood police will charge them with drug supply offences and directing the activities of a criminal group.

"Basically it (the murder investigation) provided information about how the activities were being directed," Detective Acting Superintendent Henney said.

"The activities themselves, the supply of drugs, was already well under investigation.

"What we uncovered was who was directing it, who was moving payments, who was instructing what was to happen."

Dillon, 15, was shot in the head while in bed in his Glenfield home on April 14.

Seven people have previously been charged over the teenager's murder and are before the courts.