The percentage of convictions in Hawke's Bay and East Coast courts is at historically high levels.
Statistics New Zealand figures reveal more than 87 per cent of people prosecuted in the region's courts last year were convicted. The last five years have been higher than any other year on record since data became available in 1980.
Lawyer Jonathan Krebs said the higher percentage of convictions was a positive trend and a result of appropriate police judgment which often started at street level.
"I think there's a greater enthusiasm for the use of warnings rather than prosecutions, which has a policy basis," Mr Krebs said. "Police are choosing to not prosecute the weaker cases, and that means a great percentage of stronger cases going before the courts."
Police introduced pre-charge warnings in 2010. It is a formal warning given after an arrest for a minor offence, and is not recorded on an individual's criminal record.