Portland criminals are finding it increasingly difficult to outrun the law, with police revealing that the division has racked up a staggering 167 per cent murder clear-up rate this year as detectives tighten the noose on killers and other offenders.

Commanding Officer Superintendent Ainsley McCarthy said the impressive figures reflect months of intelligence-driven policing and relentless investigative work aimed at bringing offenders before the courts.

"When we look at our clear-up rates... we have had 167% clear-up," McCarthy said during a divisional review.