"The coroner has found the cause of death determined by the pathologist to be as a single gunshot wound to the head that appeared to be self inflicted," Detective Superintendent Rod Drew said today.
"No other bullet wound or injury caused by Police, any other agency or person was found."
Police fired only two shots at Molenaar, 51, after the siege began last Thursday morning. He was found dead in his Chaucer Rd house on Napier Hill on Saturday morning.
Molenaar gunned down Senior Constable Len Snee, whose funeral is this afternoon.
He shot and wounded Senior Constables Grant Diver and Bruce Miller, and civilian Leonard Holmwood.
Mr Drew said as far as the investigation process was concerned the area canvas had all but finished and had revealed some disturbing facts.
"Some houses sustained damage as far away as 400 metres from the gunman's home which indicates just how dangerous a rampage it was and the danger posed to the general public.
"The overall picture of what has occurred is becoming clearer and we have evidence of one murder and evidence to support 21 attempted murders of Police, emergency service workers, rescuers and members of the public."
Mr Drew said Police believed it was extremely fortunate no-one else was killed and he was immensely proud of the effort being put in by the investigation team during what was a difficult time.
"The investigation has been very difficult, many of us knew Len and some knew him very well so it's been very hard. So I'm very proud of the way they've shown real grit and got on with the job.
"Today the investigation team will join with Len's family and his wider Police family and the community to farewell their colleague and friend."
Mr Diver's condition has improved to the point where he would be able to attend the funeral.
Mr Miller was still in the intensive care unit of Hawke's Bay Hospital, where his condition was stable but improving.
Mr Holmwood was also improving, but would have a further operation today to remove shrapnel.
