My question involves a power of attorney in the state of: Illinois

My question involves a power of attorney in the state of: Illinois A very close friend of my fathers that we both consider family and he and my dad are like brothers. They both were out of state in Indiana working and he (my dads friend) had a stroke. He came out of it with nothing wrong with him but left side could not be used. But can move a little. The doctors there were so surprised at his quick recovery and that he had no speech or memory problems. After a few weeks there his insurance said he needed rehab so they recommended he go to one in illinois close to them and is an acute rehab. They transported him. At the hospital in Indiana before he left he appointed my dad his health power of attorney. He had already my dad down as next to kin on his papers on the job site. He has family back where they both are from and he has over and over told the place he is at that he wants to go back home to a rehab. But his other sister that lives close to illinois