Some of the business dealings seem to have involved large amounts of money - $9 mill here?
http://www.boe.ca.gov/meetings/pdf/hearingsummaries/Item_B_Sachs_Andra_R_446027_sum.pdf
However, I notice police have said they don't think this is a murder/suicide and it
might be a homicide. And that it's an isolated incident and they don't think the rest of the community are at risk.
It seems strange that a killer would have shot an 8 year old child (I presume as a possible witness), but have left the teenagers after taking a shot and missing one. Also that there were no signs of a break in and the guard dogs were not harmed either.
I don't know.....money and someone connected to the couple's many business ventures seems the obvious solution, but the 'might be' homicide remark is playing on my mind. If it's not homicide and not murder/suicide, then that only leaves one option.