About half an hour before the deaths, a couple saw a woman in the hotel lobby in a highly distressed state yelling into a cellphone with a baby wrapped in a blanket.
"For the husband, even the possibility of an accident is conceivable, given the low level of the barrier at the apartment and the strong wind felt by those approaching the balcony," Ms Rueda said.
Mr Quiroz initially delayed his return to Mexico while the police investigation was under way. Police have said they are not seeking anyone in connection with the deaths.
Mr Quiroz intended to return to New Zealand to complete his work and was grateful for the support he received here, particularly from Victim Support, who stayed with him day and night after the deaths.
Auckland city police spokeswoman Noreen Hegarty said the case had been referred to the coroner.