Leslie Grantham (pictured), nicknamed 'Lethal Les,' was found dumped with gruesome injuries outside Rockingham Hospital on May 14

New CCTV footage of a group of Comanchero bikies allegedly planning a shocking attack on one of their own has been released by police in a bid to solve the case. 

Leslie Grantham, 51, a senior member of the notorious gang, was found dumped with gruesome injuries outside Rockingham Hospital, in Perth, about 10pm on May 14.

Grantham, nicknamed ‘Lethal Les,’ had burns and multiple gun shot wounds to his upper body and leg – believed to have been attempts to remove some of his tattoos. 

He was rushed to Perth Royal Hospital and has since been discharged, but is refusing to co-operate with authorities. 

CCTV released on Friday appeared to show a group of people arriving at Auburn Grove Train Station in three separate vehicles.

Police believe the group were meeting and swapping vehicles as part of their plans for the alleged attack on Grantham. 

Detectives also released footage from after the incident, which showed one of the vehicles from the earlier meeting entering Rockingham Hospital emergency department carpark.

That car was a white and grey Holden dual-cab utility, with WA registration 1BFC417.

Leslie Grantham (pictured), nicknamed 'Lethal Les,' was found dumped with gruesome injuries outside Rockingham Hospital on May 14

Leslie Grantham (pictured), nicknamed ‘Lethal Les,’ was found dumped with gruesome injuries outside Rockingham Hospital on May 14

Grantham had burns and multiple gun shot wounds on his upper body and leg (pictured)

Grantham had burns and multiple gun shot wounds on his upper body and leg (pictured)

Police believe the white ute with WA registration 1BFC417 (pictured) was used to transport Grantham to the incident location, and then to the hospital afterwards

Police believe the white ute with WA registration 1BFC417 (pictured) was used to transport Grantham to the incident location, and then to the hospital afterwards

Police believe the ute was used to transport Grantham to the incident location, and then to the hospital afterwards.

Detective Senior Sergeant Todd White said police were continuing to seek public assistance in their investigation. 

‘If you’re thinking of joining an outlaw motorcycle gang, think again,’ he said.

‘This man has been left with brutal, life-changing injuries due to his association with an outlaw motorcycle gang.’ 

Grantham was previously jailed in 2017 over threatening to shoot a man unless he paid $10,000 to compensate a prostitute he had allegedly mistreated. 

He was also jailed in 2015 along with nine other Comanchero bikie members over a plot to extract ‘protection’ money’ of $10,000 a month from the owners of a karaoke bar in Sydney’s north shore. 

The Comanchero motorcycle gang was first established in Sydney in 1966 and has since grown to over 500 members nationwide.

The patch features an old western wagon wheel on a red background.

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