Maria Claudia Lutz and children Martin and Elisa. Photo / Facebook
Maria Claudia Lutz and children Martin and Elisa. Photo / Facebook
The Sydney family of four found dead in their home yesterday are believed to have been deliberately gassed to death with a poison that was released using devices throughout the house.
Mother Maria Claudia Lutz, 43, was found in one room with one of her children and her other child was found alone in a separate room.
Fernando Manrique's body was found in another room in the house.
Fernando Manrique and Maria Claudia Lutz - neighbours report he was working on the house two days before the family were killed. Photo / Facebook
Mr Manrique was spotted working on the roof of the house using power tools just days before the tragedy occurred. It is believed he was installing some sort of system to disperse the poison throughout the house.
"There was a lot of pre-planning that went into this," a police source said.
A neighbour said she watched Mr Manrique, 44, working on the house with power tools just two days before his death.
According to the Drake Business Logistics website, where Mr Manrique worked, his duties included being "actively involved in re-engineering and company mergers, where he has used his expertise and engineering training to successfully bring operational and strategic goals together".
Ofik Thomassian, 72, lives directly across the street from where the family died.
"He was very friendly and she was very protective of those children," Ms Thomassian said.
"She would lead them one at a time into the car, lock the door, and return to the house for the next child."
Martin and Elisa reportedly had severe autism which meant they were unable to speak. Photo / Facebook
Police confirmed they were looking at the possibility the family died as the result of "the introduction of an air-borne gas" and said they were waiting on toxicology results to determine the type of gas.
Investigators are also attempting to locate where the gas was purchased.
Tributes began to flow as neighbours mourned the loss of the loving family of four, including the couple's two autistic children Martin, 10, and Eliza, 11.
Their family dog was also found dead nearby.
One by one, heartbroken friends laid flowers outside the home and shed tears for "the innocent children" whose lives were stolen far too soon.
Neighbour Brooke Topschij was planning to celebrate her 18th birthday today but what was to be a joyous night out alongside friends has turned into a painful test of her strength.
The teenager has called on police not to delay releasing an official verdict on the deaths in order to give those who knew the family closure.
Premier Mike Baird today expressed his shock over the tragedy.
"Like everyone across the state that sort of tragedy stops you in your tracks," Mr Baird told a press conference today.
"I can't imagine the circumstances but all I know - for their other family and friends - our hearts go out to them and our thoughts go out to them. Just tragic, tragic circumstances."
Nearly 24 hours on from the discovery of the bodies, forensic crews are still working inside.
The property has been cordoned off and police are cautioning the well-meaning public from getting too close.
It could be weeks or even longer until the narrative leading up to the family's death becomes complete.
