If a civil matter is related to real property, and the real property is located in Indiana, then an Indiana court alone has any jurisdiction over matters of real property in Indiana. However, with regard to guardianship, you are right, I think - that would depend on where the person is domiciled, and it seems that that would be in CO. I'm not a probate lawyer though, just a regular ol' commercial and insurance lawyer so I am by no means an expert on this stuff! We will see what the IN court does with this!