I am sorry to hear that you are dealing with this. It must be extremely traumatic. Having seen a family member go through a similar case, I know where you are going mentally. The best advice I can give you is to get professional legal support involved ASAP.
Hiring the kind of wrongful death attorney El Centro has in abundance should be your priority. Hire an experienced legal team and explain the situation fully – even if your situation looks bad, do not disguise the truth. Be honest with them, and they can do everything realistically possible to help build a credible argument on your behalf.
You need the right kind of support, though, as fighting a case like this alone is asking for trouble. Hire help, though, and you should be able to come out the other side unscathed. Do not contest this alone, though; the stakes are too high.