On a bright note it seems that IL has something of a castle law. I just read this on illinoiscarry.com in regards to Use of force in defense of dwelling.
(b - In no case shall any act involving the use of force justified under this Section give rise to any claim or liability brought by or on behalf of any person acting within the definition of "aggressor" set forth in Section 7 4 of this Article, or the estate, spouse, or other family member of such a person, against the person or estate of the person using such justified force, unless the use of force involves willful or wanton misconduct.
So what I take from this is that should I have to use deadly force in a home invasion situation I would be immune from civil suits from the "aggressor" and/or their family? Am I correct in how I read that?
Note: Here is the IL law regarding use of lethal force in defense of dwelling. Again from illinoiscarry.com
However, he is justified in the use of force which is intended or likely to cause death or great bodily harm only if:
(1) The entry is made or attempted in a violent,
riotous, or tumultuous manner, and he reasonably believes that such force is necessary to prevent an assault upon, or offer of personal violence to, him or another then in the dwelling, or