You have a complex situation and you should speak with a Nevada attorney if you are concerned about where things stand. If your brother is acting as executor, then the attorney represents HIM and may or may not be willing/able, to advise YOU. Without knowing what paperwork was sent to your brother, it is impossible to give you any additional guidance.
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Get yourself a lawyer in Las Vegas. Pronto.
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I am not sure what you mean by "started the legal process." If an estate has been opened up for your brother that can be found out in a minute by going on line. You should be getting copies of anything filed in court. The lawyer's secretary can't be technically "handling" the estate because she doesn't have a law license, but you might as well find out what she says. And, yes, you should contract a Las Vegas lawyer for a phone consult to determine if you need to have your own lawyer.