The driver of a green vehicle who police wanted to talk to in connection with the fatal shooting of a road worker has come forward.
Officers have set up checkpoints on five roads near where George Taiaroa was shot last Tuesday, asking motorists if they have any information.
The green vehicle was on a one-lane bridge just prior to the shooting there.
After a public appeal on Monday, the driver contacted police on Tuesday.
Detective Inspector Tim Anderson say progress is slow on the case.
He says police still haven't located a blue Jeep Cherokee vehicle at the centre of the case, or its male driver.
Mr Anderson says they don't have a suspect or a motive but believe the public may hold the key to the investigation.
He says it appears the offender was familiar with local roads.
Inspector Anderson is asking anyone who will be in the Atiamuri area over Easter to keep a lookout for the blue Jeep Cherokee.