I posted a bit about this in July in the "Wills" forum: my grandfather passed in June, 2 months after my dad died, and my uncle claims grandfather's will not found (after asking me if my dad had given me a copy before he died).
Within 2 weeks after grandfather's death, uncle spent in excess of $100K on cars, motorcycles, etc. Grandpa lived modestly and saved, saved, saved. When he went into the nursing home last year with Alzheimer's, our family found that he had a LOT of $ in several checking accounts, and no telling how much property he owned. So, uncle took over grandfather's finances (my dad was sick and unable to help by this point).
I did some checking on intestate distribution in the state in which grandfather died, Arkansas. I was sole heir of my dad's estate (which made me the proud owner of some furniture, he lost everything due to his long illness), so I figured I would get my dad's share of grandfather's estate through intestate distribution once probate started. I've been calling the probate clerk in the county in which grandfather died periodically to check on the process...estate is not being probated, uncle just took over money and property.
I thought uncle had POA while grandfather was suffering from Alzheimer's in the nursing home, but I found out from county clerk that he had guardianship, which is quite different from POA. I know POA terminates after death, but I know nothing about guardianship. Within 2 weeks after grandfather's death, uncle spent in excess of $100K on cars, motorcycles, etc. I guess he plans to just keep all grandfather's assets with no regard for the rest of the family. His kids might benefit when he dies, but now me and my son are disinherited. Knowing my grandfather as I did, I don't think he intended that at all.
I have no idea what to do or if I would even take recourse if I had any. My uncle and his kids are the only family I have left.