Great work everyone! I looked at the inmate booking info, and it says 207(A) - Felony Kidnapping. California has a few different subsections of kidnapping. (A) is by force:
207. (a) Every person who forcibly, or by any other means of
instilling fear, steals or takes, or holds, detains, or arrests any
person in this state, and carries the person into another country,
state, or county, or into another part of the same county, is guilty
of kidnapping.
(b) covers "luring" or "enticing." So LE believes MH either threatened or forced Sandra - this wasn't a case of "want to come in the house and see my puppy?"
That makes it even more strange to me! Everyone already said how surprised they were it was a woman- I'm even more surprised now. Women killers usually have more of a "soft kill" or luring, not out-right violence against children.