Really looking to get information due to not having any knowledge about legal things !!

My grandmother came from Cuba in the early 1980s to Miami and Orlando, Florida !

Back and forth since my great grandfather has been living in the US since the 1950s !

My great grandfather divorced my great grandmother when he migrated to the US and he married another women which he never had children with !

No one really knows a “REAL STORY” as my family only knows what my grandmother was told and what came out on the news papers !

He and his wife got into a fight due to him having an affair and basically having another child (My grandmother does not have any information on this girl who should be in her 30s) and giving my grandmother EVERYTHING when she came to the US ! His wife wasn’t to happy about that ! They had a relationship argument according to the crime scene investigation. Had breakfast with her and murdered her then slept with her, woke up and killed himself !

Pretty terrible and sad that my grandmother had to go in the home and identify my great grandfather and his wife !

My grandmother now believes my great grandfather left her and her younger sibling which should be in her 30s a will !

How can we obtain information on my grandmothers sister and her fathers will ?

She’s been asking me to do my research but I’m not willing to put my credit card on all these sites due to fraud !

Please help ! Any information helps also !

I would love for my grandmother to meet her sister and talk to her about their father since the girl was super young when this happened !