Helping People

Can a person sue a nurse for wrong treatment given in an emergency situation?
My neighbor's dog bites one of his guests. Being a nurse, I gave some first aid to the person. He told that it is very painful and asked me for a painkiller and I gave that medicine too. He went to the hospital and the doctor told him that I gave him wrong treatment. Can he sue me for this?
What is the Good Samaritan law Iowa?
Last month I helped a guy who got injured in an accident. I took him to the hospital and got him admitted and once the police took charge of the case I left the scene. Now the guy is claiming damages from me for not giving him first aid before I took him to the hospital. What defense can I take in this case?
What is the Good Samaritan law Illinois?
My son while playing in the children park fell from one of the swings and got injured. A person who claimed to be a member of the American Red Cross came to help my son and gave him first aid. Later when I took my son to the doc, I was told that my son’s bandage was not properly done and due to this, his injury had become much more serious. Can I sue this guy for not treating my son properly.
Can a person sue me for the injuries caused while rescuing him?
I saw somebody fall into a ditch. Immediately, I took a rope and somehow tied it to his hand and pulled him up. He sustained some injuries while doing this. Can he sue me for the injuries?
What is the Good Samaritan law in Idaho?
A group of college students helped my son when his bike got hit by a bus. These guys took my son to the hospital but it seems that while they were carrying him to their car, one of the guys’ bag fell on my son's head, which made my son's head injury become worse. Can I claim damages against these guys for not handling my son properly at that time? We live in Idaho.