Police investigating the fatal shooting of a Paeroa businessman outside his shop and home say they are working on a genuine whodunit.

Detective Senior Sergeant Mike Whitehead says as the investigation into the death of 55-year-old Jordan Voudouris nears the end of the fourth week the 30 strong Operation Olive team is busy consolidating and rechecking information to hand.

Tributes were placed outside Mykono's Pizza and Pasta for slain businessman Jordon Voudouris. Inset: Jordan Voudouris.

'This is a real whodunit mystery. We have not established why Jordan was killed.

'Often in such cases in small communities information vital to the case comes to hand at an early stage, but to date we haven't been able to establish if this is a robbery that has gone wrong or if someone had a reason to harm Jordan.”

Mike says police have profiled Jordan in an attempt to identify anything that might assist in solving the mystery.

'While it's not uncommon for people to speak well of a person after they have died, police can usually establish if there is a darker side to their lives. In Jordan's case everything is overwhelmingly positive.”

He says Jordan left behind three children from a previous relationship and was remembered as a supportive, caring father.

He was killed five days before his 56th birthday.

'Jordan grew up in an orphanage in Greece before travelling the world as a merchant seaman and then following an older brother to settle here in New Zealand. He established his business in Paeroa eight years ago and was well liked.

'He was well respected by his staff and when asked if he had anything troubling him, one worker said the last issue of concern Jordan had that she remembered was when he had to raise his prices because of a rise in GST.”

Mike says the staff member told police that Jordan had put up a letter of apology concerning raising his prices, while others had told of a man who would gift food to children or customers he thought had waited too long for their orders.

He says in all other aspects covered so far, a picture of a genuinely decent, kind-hearted man had appeared.

'In a way this then makes it more difficult for investigators - here we have a decent man with no apparent reason why anyone would harm him let alone shoot him.

'I believe the key to this case still lies in Paeroa, be that someone who saw or heard something, perhaps not realising the significance, and hasn't told police, or that someone has been told something about what happened and is keeping quiet. If that person is you we ask you consider contacting us.”

Investigators are keen to speak to people with information and are asking people to contact Paeroa officers on 07 862 8744.

Information can also be left anonymously with Crimestoppers on 0800 555111.

'But that's not the only conduit for information,” says Mike.

'As of today the investigation team has launched a Facebook site -www.facebook.com/PaeroaPoliceJordanVoudourisHomicide - where information can be left as well as a website link, www.police.govt.nz/olive.

'The key thing for investigators is, it doesn't matter what method you use to provide police with information - the important thing is that you do.”