Dion Madden and Beau Cochrane pleaded guilty to drug and weapon charges after Magill bust

Police allege Nomad bikie drug dealers were busted after they planted cameras and listening devices to uncover a sophisticated meth and heroin operation.

Two of three men charged with a significant drug and weapons haul remain in custody after covert cameras and listening devices were set up by police at a Magill shed.

Beau James Cochrane, 30, and Dion Jay Madden, 40, who police allege are members of the Nomads bikie gang, have now pleaded guilty to some of their charges.

Adam Robert Fennell, 47, – who was previously an F45 trainer at the Glenelg studio – is also accused of running the sophisticated drug dealing business.

Thousands of dollars worth of heroin and meth were taken off the streets, as well as 11 firearms, five vehicles, four Harley Davidson motorcycles and a jetski after seven properties were searched in Adelaide’s north and east on April 23.

The prosecution evidence included more than 15,000 intercepted telephone recordings and visual recordings from a shed at a Magill address from a covert camera and listening device.

“The investigation shows that there was a large amount of methamphetamine sighted, as well as the three accused in this matter handling packaging and weighing methamphetamine for sale,” a prosecutor said during Fennell’s bail application in April.

“Large amounts of cash have been sighted being counted by the three co-accused and discussions in relation to quantities of methamphetamine and heroin were captured.”

The Nomads were put under the spotlight during Operation Leo, an investigation that began in December.

Dion Madden. Photo: Facebook

Adam Fennell. Photo: Facebook

All three men are charged with commercial drug trafficking and money laundering, while Madden, of Glynde, and Cochrane, of Highbury, are also charged with possessing multiple firearms.

Michael Woods, for Cochrane, told the Adelaide Magistrates Court on Monday he would be pleading guilty to some of his charges.

Cochrane pleaded guilty to trafficking methamphetamine and possessing a calibre pistol.

He was charged with commercial drug trafficking and the prosecution said they would not accept his plea to the lesser charge.

Last month, Madden pleaded guilty to trafficking in a commercial quantity of methamphetamine and heroin and possessing a loaded pistol.

Fennell, of Payneham, will next appear in court in February. He is yet to enter any pleas to his charges.