It is alleged that while Mr Greenslade was out of the room Herkt put some of the cans in his bag.
An argument progressed to a fist fight between the two men. Ms Tito and Herkt were locked out of the flat and the victim shouted at them to leave.
Herkt allegedly persuaded a neighbour to give him a cricket bat and a kitchen knife before returning to Mr Greenslade's residence and forcing entry.
The victim sustained stab wounds to the back of the head, base of the neck and a seven-centimetre cut along the scalp. The fatal blow went through the upper left abdomen, cutting the liver and piercing the heart.
The trial, before Justice Simon Moore and a jury of seven women and five men, is scheduled to last three weeks.