The man who gunned down underworld gangland figure Walid "Wally" Ahmad was wearing a woman's top, police today revealed.

"Despite the efforts made to conceal his identity, we have been able to determine the shooter was wearing a women’s Nike Club FZ hooded jumper – the style and colour was only available in the women’s range," NSW Police said in a statement.

"There may be someone who owned that specific item of clothing and does not know their jumper was worn by the shooter in this offence – we would certainly urge that person to come forward.

Wally Ahmad (left) and the Nike Club FZ hoodie police say the killer was wearing.

The revelation from police comes after they employed futuristic laser technology to create a 3D rendering of a crime scene in western Sydney where Ahmad, 40, was executed in April 29 last year.

Officers from the Forensic and Technical Support Command conducted a laser scan of the shopping centre car park in Bankstown where he was killed while sipping coffee.

Ahmad was one of three people injured in the shooting, and he later died at the scene.

The lasers were used today to scan the car park as part of the ongoing investigation into the shooting.

This is the coffee shop where Ahmad was gunned down.

The lasers will recreate the shooting.

Ahmad was considered one of the city's major crime figures and was the subject of a murder investigation shortly before his death.

"It was a targeted attack... it was... an appalling act of violence," Detective Sergeant Peter Rudens said today.

"This offender went to an effort to disguise himself, however there are characteristics of this offender that are captured in the CCTV footage."

The technology was used in the investigation into the Lindt Café Siege.

Homicide Squad detectives from Strike Force Bindon have strong suspicions about the identity of those responsible for Ahmad’s murder, but they are keeping an open mind.

Police will use the 3D rendering along with CCTV of the shooting.

Officers were at the scene of the crime today.

Det Sgt Peter Rudens said the 3D images of the crime scene would be analysed along with CCTV to provide biometric measurements of the shooter.

“The 3D scanning technology will provide us with an animated fly-through of the crime scene and allow us to accurately determine specific attributes of the shooter, including height and build,” Det Sgt Rudens said.

“Despite the efforts made to conceal his identity, we have been able to determine the shooter was wearing a women’s Nike Club FZ hooded jumper – the style and colour was only available in the women’s range.

“There may be someone who owned that specific item of clothing and does not know their jumper was worn by the shooter in this offence – we would certainly urge that person to come forward.