He had been evading police, who wanted to speak with him about the double murder.
Soon after he was found by members of the armed offenders squad and the police Eagle helicopter, he shot himself.
Police are yet to officially release Mr Mowatt's name, and say they will not do so until they have completed a formal identification process.
Detective Inspector Dave Lynch said he was to speak to the coroner today about matters relating to the formal identification.
Mr Mowatt's family have not been able to make firm plans for a funeral, because of the delay identifying him.
Mr Waite was farewelled at an emotional service in Papatoetoe last Friday.
Ms Stanton's funeral will be held this afternoon at All Saints Chapel and Purewa Crematorium in Meadowbank.