Police allege Zounis broke into a house at Berkeley Vale on Wednesday morning and shot a 37-year-old man, leaving him with gunshot wounds to the torso and hand. The victim remains in hospital in a stable condition and is cooperating with investigators.
NSW Police Raptor Squad Commander Detective Acting Superintendent Brad Abdy said the two men did not appear to be known to each other. "We don't believe there was any prior connection between these two people and it's most likely a crime as a service-type crime," he said.
Zounis was tracked after police spoke to witnesses who saw a car at the scene. Investigators followed the trail to Penrith, then to Newcastle and finally to Gosford, where he was taken into custody. At the time of his arrest, he was allegedly in possession of cannabis and cocaine.
A subsequent search of his Penrith home uncovered a Glock pistol and eight rounds of ammunition.
It remains unclear whether the shooting is linked to a recent spate of gun violence in Sydney. "Whether there's gang involvement or organised crime involvement, they're areas that we're exploring," Acting Superintendent Abdy said. A motive has not yet been determined.
Zounis did not appear in bail court when the charges were briefly mentioned, and no application for bail was made on his behalf. The matter has been adjourned until November.