The National Police Dive Squad has completed searching the Waikato River, as part of the ongoing investigation into the murder of George Taiaroa.
Mr Taiaroa was gunned down on Tuesday afternoon, while he worked a stop-go sign between Tokoroa and Taupo.
Police say their search of the river has now been completed, and they were not able to locate any items of significance.
An tip line has had nearly 30 calls from the public, primarily relating to vehicle sightings.
That line can be reached on 0800 KINGSWOOD.