Day and night they are hunting the men, women and youths responsible for thousands of crimes between them.
Over the past three weeks police have been doing a spring clean of Peel's streets, targeting criminals wanted for significant contributions to the region's rising crime rates.
Up to 70 specialist police have been in the district to find prolific offenders and gather intelligence on everything from burglaries and thefts to low- level and organised crime drug networks.
The operation, dubbed Esteem, has led to 109 arrests, 219 summones and 451 charges.
Peel district Acting Insp. Brett Ranford said he was pleased with the initial results.
He said police had seized drugs, including cannabis, steroids and amphetamines, illegal firearms such as sawn-off shot guns, stun guns and modified nail guns and more than $30,000 in cash believed to have been acquired through illegal means.
This week _The West Australian _ spent a day with two specialist officers involved in the crackdown.
With the operation reassessed and re-prioritised every day, the officers collect an updated information package containing their hit list of high-risk offenders they have been assigned to find during their shift.
Within 15 minutes of being on the road, they make their first arrest; a man who failed to appear in a northern suburbs court the previous day.
He offers no excuses or resistance. A secure van arrives at his Rockingham home within minutes and he begins the long trip north to spend the night in the lock up.
The man's calm demeanour is rare and further highlighted when officers prepare for their next outstanding warrant in Greenfields.
They have requested back up because the woman they are searching for was found a few weeks ago hidden and agitated in a linen cupboard.
A knock on the door, a search of the property and a few chats to neighbours reveal she has not been home in a few days.
The information adds to the intelligence police are collecting to help later shifts find and bring her in.
Acting Insp. Ranford said it was hoped the operation would bring the number of reported crimes down.
"Once our targeted prolific offenders have been dealt with for the crimes we know about then hopefully they won't be reoffending tomorrow or next week," he said.
The number of wanted offenders identified through DNA or finger prints has been reduced from 50 to about 10 with the help of extra resources.
"We want to have an impact now," Acting Insp. Ranford said. "We don't want to see that traditional spike in crime in summer.
"We want to cut the spike off at the knees, so to speak, so that when those months are here, we have had an impact on those people that are likely to commit those crimes.
"We'll see the proper impact not long after Esteem finishes.
"We all live for instant success and instant statistics to prove that it's all working, but I'm confident with the number of arrests and the people we are targeting in the next couple of months we will see a dramatic decrease in the number of reported crimes in our district."
The three-month operation ends in November.