According to our partners at the Denver Post, Investigator Brad Gibson says the leak was in a utility room but it spread to through the home on Nov. 28. The family had won a weekend vacation at the Aspen home through a fundraiser.
Killed were Parker Lofgren, 39, Caroline Lofgren, 42, and their children, 10-year-old Owen and 8-year-old Sophie.
Officials are not saying whether the home had a carbon-monoxide detector and Gibson says investigators are trying to determine how the pipe came undone.
State lawmakers this session will consider whether all homes should be required to have carbon-monoxide detectors.
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