Shaun Falkiner Found Guilty Of Elizabeth Shopping Centre Stabbing

A man who stole a knife before he fatally stabbed another man outside a suburban Adelaide shopping centre has been jailed for at least 20 years.

A Supreme Court jury last month found 28-year-old Shaun Falkiner guilty of murdering Alexander Watts at the Elizabeth Shopping Centre in April 2017.

During the trial, jurors heard Falkiner stole a knife from Woolworths after he argued with a woman inside the complex and Mr Watts came looking for him.

Mr Watts followed Falkiner outside the centre and yelled at him, with Falkiner's partner urging him to "just do it".

He then approached Mr Watts at a pedestrian crossing and fatally plunged the 20-centimetre knife through Mr Watts' stomach.

Justice Trish Kelly said she accepted Falkiner did not intend to kill Mr Watts, but had at least wanted to inflict serious harm.

"There is no excuse for ever introducing a violent weapon such as a large knife into any altercation," she said on Wednesday.

She rejected his lawyer's suggestion he should receive a lesser sentence because of the actions of Mr Watts leading up to the stabbing, saying Falkiner's response was "quite disproportionate to the circumstances".

Justice Kelly sentenced Falkiner to life with the mandatory minimum non-parole period of 20 years in jail for the murder.

"The Watts family and friends have lost a much-loved son, brother, friend and mentor with the death of Alexander that night," she said.

"You must now pay for your decision to use that knife in those fatal few seconds as you crossed the pedestrian crossing that night."