The motive for killing George Taiaroa would appall most people, but police will not go into specific details about it.
Addressing a media conference about the shooting in Rotorua this afternoon, Detective Inspector Tim Anderson said police had spoken to their suspect man as part of their investigation.
Mr Anderson also issued a warning to those who were hiding him.
He said police believe they now knew the motive of the shooting. Drugs, gangs and mistaken identity could be ruled out.
Mr Taiaroa was shot as he operated a stop-go sign on Tram Road at Atiamuri in Waikato on March 19.
Mr Anderson said police believed Mr Taiaroa was sought out and targeted by his killer.
"However we do not believe that George or his family knew his killer. There is no evidence that this was a case of mistaken identity."
Mr Anderson said the motive for the murder was misguided and it was beyond comprehension.
He warned that protecting the murderer was tantamount to pulling the trigger.
Police were keeping an eye on a handful of people in connection to the shooting.
Mr Anderson said the suspect was a cold blooded killer and the shooting was planned, thought through and targeted.
However, he believed no one else was in danger.
Mr Anderson said those who were assisting the suspect had mis-placed loyalty and he urged them to come forward.
Mr Taiaroa's family were being kept well informed about the progress of the investigation and were staying very strong.
Mr Anderson said no arrests had yet been made.
He confirmed the suspect had been spoken to by police as part of the investigation but would not say whether he was known to police before the shooting happened.
