Days later Manrique and his family, including two children, were found dead inside the home. It's believed they were gassed to death.
NSW Police are treating the deaths as a murder-suicide, saying the tragedy was no accident.
"There was a lot of pre-planning that went into this," a police source told The Daily Telegraph.
"There was a lot of pre-planning that went into this," a police source told The Daily Telegraph.
Maria Claudia Lutz with her children Elisa and Martin. Image: Facebook
Police noted that none of the victims had any 'visible injuries'.
Fairfax reports police found two cylinders outside the family home, which led to them uncovering an elaborate gas network.
"It is early days in the investigation and investigators will need to wait for toxicology results and results of the post-mortems to determine cause of death," a police statement read.
The body of Maria Claudia Lutz, 43, was found in one room with her one of her children, while a second child was found alone in another part of the house.