Hours after Miguel Silva allegedly saw his sister's boyfriend shoot a young drug dealer at point blank range he let the killer stay at his Sydney smash repair shop, a witness says.
The crown alleges Silva witnessed James Polkinghorne shoot Nikolas Argiropoulos in the head in a park in Sydney's inner-west in March 2012 after a drug deal went sour.
Silva, 29, has pleaded not guilty to being an accessory after the fact and concealing a serious indictable offence.
Speaking at Silva's trial on Thursday, the key crown witness told Sydney's Downing Centre District Court that he was paid to drop Polkinghorne and Silva into the city's CBD to meet Mr Argiropoulos the day he was murdered.
Soon after, he picked the pair up and drove back to Silva's smash repair shop where Polkinghorne and Silva "tested the quality of the drugs".
Later that night, it is alleged Polkinghorne shot Mr Argiropoulos at a Birchgrove park while Silva watched.
The next day, the witness said he was called to Silva's smash repair shop where Polkinghorne confessed he had murdered Mr Argiropoulos.
"(Polkinghorne) was paranoid, edgy ... He looked as though he hadn't slept.
"He said to me that he'd killed Nik."
Some time later the witness said Polkinghorne was on ice and rambling when he told him he had "shot (Mr Argiropoulos) in the head and Miguel `s*** himself and ran off'."
Silva knew Polkinghorne because he was living with his sister, Jessica.
A regular ice user, Polkinghorne had become increasingly abusive toward her, and weeks after Mr Argiropoulos' murder, Jessica stabbed him to death with a knife.
The witness said he also knew where Polkinghorne had stashed his gun, the bullets and his clothes.
He admitted he initially told police a series of elaborate lies about his knowledge of the killing.
Defence barrister Greg Scragg suggested to the witness he had made plans to have Silva "taken out" because he was worried the 29-year-old would tell police about his ties to drug crime.
"Nik was dead, Polkinghorne was dead and only Miguel Silva knew anything about it," Mr Scragg put to the witness.
"Yes," the witness replied, but he denied making plans to kill Silva.
The trial continues.
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