Four young “idiots” were allegedly caught racing each other at more than 100km/h over the speed limit near where Nick Campo was killed in a crash last year — with one of the boys in the car admitting he was friends with the teenager.

WA’s top traffic cop Mike Bell said he was “baffled” after hearing the four teenagers — aged between 17 and 18 — were allegedly caught speeding at 175km/h in a 70km/h zone on South Street in Murdoch on Wednesday night.

The area is close to where 18-year-old Mr Campo was killed in a crash when the car he was a passenger in rolled before hitting another vehicle on July 13 last year.

The four teenagers were allegedly racing in high-performance luxury vehicles, including a Mercedes Benz CLA couple, a black Audi S5 couple, and a grey Audi hatchback.

None of the teens were the registered owners of the cars, with three of the drivers on their P-plates, while the fourth had a suspended learner’s permit.

Cdr Bell said when police spoke to the teens, a passenger in one of the cars said he was aware of last July’s tragedy — because he was friends with Mr Campo.

“What is really disappointing is last night when my officers were trying to educate these young people on the side of the road and referenced the Nick Campo fatal crash in July last year, one of the people involved identified themselves as a friend of Nick Campo,” he said.

“We’ve all heard Daniel Campo’s gut-wrenching story about how his family has been devastated with the loss of Nick.”

Cdr Bell said the “interdiction of my officers last night has stopped four other families standing before you and appearing in the paper or on their news, talking about how devastated they are because they lost a young member of their family.”

“These idiots saw fit to travel 175km/h in a 70km/h zone,” he said.

“The consequences of a crash would be catastrophic to both the drivers, any pedestrians and I suspect people in their houses.

“As the road toll is approaching 50, we have great concerns that people see fit to do this.”

Cdr Bell said the group had handheld walkie-talkies, which he said “shows a level of organisation”, and one of the cars drove behind the other three, recording the cars in front on dash-cam video.

“One of the last things you see in the dash cam is someone yelling ‘cops, cops, cops’,” he said.

“But it was all over, too late for them.

“These are all high-end performance vehicles. So whoever lent them the vehicles to the P-plate drivers and the driver without a licence, needs to look at themselves.”

Two 17-year-old boys and an 18-year-old man have been charged by summons with reckless driving and are due in court at a later date.

Another 18-year-old man was charged with reckless driving and having no authority to drive.

Cdr Bell said police were increasingly seeing young people hooning and officers were “at a loss” at what more they could do.

When asked if the group was remorseful, Cdr Bell replied; “I think they were remorseful because they got caught”.

The incident comes as police this week unveiled a confiscated Maserati sports car, now bearing police signage and the warning “this is what happens when we put our foot down”.

The $100,000 car is not an operational police vehicle, but is being used at community events to promote road safety.