A man, 32, who allegedly used two knives to stab his sister’s partner to death at Belmont South, after the 50-year-old had twice deliberately reversed his four-wheel-drive into another car, has been refused bail in Newcastle Local Court.

It's understood that it wasn’t so much a road-rage incident that triggered the alleged frantic stabbing in the middle of the day in usually quiet Beach Street on Wednesday, but rather the culmination of years of bitter conflict between siblings.

The scene of the alleged stabbing in Beach Street, Belmont South on Wednesday afternoon. And, inset, Justin Fuller, 32, was refused bail in Newcastle Local Court on Thursday charged with the murder of 50-year-old Guy Hamilton McCulloch. Credit:Marina Neil

Justin Fuller, 32, of Arthur Street, Belmont South, appeared in Newcastle Local Court in handcuffs on Thursday charged with the murder of his sister’s partner, 50-year-old Guy Hamilton McCulloch.

Mr Fuller, who was represented by solicitor Iain Bruce, did not apply for bail or enter a plea and the matter was adjourned until February 13 at Belmont Local Court.