An arrest has been made in relation to the stabbing murder of Alex Watts at Elizabeth Shopping Centre on Thursday night.
A 2 day man hunt lead detectives to a residence in the northern suburbs of Adelaide.
26-year-old Shaun Falkiner was arrested at a Findon address and was lead away without incident.
Police sources say he was attempting to change his appearance when apprehended.
The murder weapon, a large knife, was found in the vicinity of Northern Sound Systems on Woodford Road, Elizabeth.
Also found was the car Falkiner was driving on the night of the slaying.
The alleged murderer will face Elizabeth Magistrates Court on Monday via video link.
Police are appealing for any passengers of bus route number 441 who may have witnessed the knifing to contact them.