They have released images of a Gerber brand machete identical to the one used used in the murder of Allen Amin Asrawe, 33, in suburban Paradise on August 9.
At the time police said the victim was in the debt recovery business and had links to criminal associates.
They believed he may have been ambushed on his way home from work in the city which he had left at about 4.30am (CST).
Details of how he died were not released, but police on Friday released the images in the hope that someone may recognise the weapon which was found at the scene.
A 25-year-old man from Paralowie was charged with the murder on August 18.
Police on Friday alleged that he was with at least one other person when Mr Asrawe was murdered and are examining DNA samples collected at the scene as part of the investigation.
Investigators are also looking to speak to anyone who may have seen a black Audi TT Coupe in the area in the early hours of August 9, or on previous days.
adelaidenow.com.au 30 Aug 2013