My question involves criminal law for the state of: CA
How do I prosecute a bigamist who is attempting to defraud my fiancé’s estate?
My fiancé was married in 2008 to a women who was married in 1982 to someone else and appears to remains married. He began annulment proceedings in October 2017 and she agreed to the annulment months earlier - in exchange for a quitclaim of one of the two properties he owned. She refused to ever file her “agreement” with the court, out of spite it appears. On February 6, 2018 he filed for an emergency ex parte hearing to void that marriage so that we could legally marry but so sadly he died of stage 4 cancer on February 8, 2018. She's attempting to intimidate and bully his mother (my would be mother in law who has known her for 20 years and expects she'll burn everything down figuratively if not literally speaking, as she's never been all that rational) into giving her the property and not finishing the annulment case. His mother has a hearing to be appointed special administrator to finish the annulment case. ETC. Really disturbed and disturbing drama.
Our entire relationship was shadowed by menacing and disturbing behavior by this person. He died before we were able to marry...it's been heartbreaking and frankly, criminal. She had told him in 2015 when they separated that she intended to file for SSA after 10 years so he "couldn't divorce her until after that date". He learned of her previous marriage by accident via an SSDI claim and we found that she was married in 6/1982. Apparently her first husband of 30+ years filed for divorce and the decision was rendered on 2/6/2018, two days before my fiancé's death.
Clearly she intended to defraud SSA as well as intends to extort everything she can from his estate.
Can I sue her for Bigamy and/or Fraud? in pro per? Or do I need to get the DA or a criminal attorney to take the case?

