SAN FRANCISCO - Investigators are still working to determine what led to the deaths of a family of four found inside their home in San Francisco’s upscale Westwood Highlands neighborhood.

Possible murder-suicide

What we know:

Two sources told KTVU the family may have died in a possible murder-suicide. However, San Francisco police said they are treating the case as a set of suspicious deaths and believe there appears to be a criminal element involved.

The department’s homicide unit is leading the investigation, but police have not officially classified the case as a homicide.

Quiet neighborhood in shock

Dig deeper:

The home on the 900 block of Monterey Boulevard was quiet Thursday, a day after it became the center of an intense police investigation.

The San Francisco Medical

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