Title Issue with multiple deeds and deaths

[Benedict A Hubbert]

I came across a potential deal with title issues. The father of the person I was talking to owned the property. He filed gift warranty deed in 2001 to his mother. Then in 2013 filed a warranty deed to the daughter. The father died a couple months ago and grandma shortly their after. There are 6 other of the fathers siblings alive. I was wondering how multiple titles can be filed? Is it worth it to pursue? Should I purchase interest in property then talk to lawyer? If so 100% or 50%? Thanks. This is in San Antonio Texas if that matters.