anybody have experience? can you buy a share of house from heir?

[Isaac El]

Found a house through cold calling, found the house by driving for dollars and very distressed.  Turns out the owner of the house passed away (has no wife) and has two adult children.  The one I was able to find contact information from says "My brother owns the property and convinced my father to give it to him, I don't own any part of it" However doesn't each child own 50% of the property? Can I buy her share?