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Executor of will 
I strongly doubt that being executor will make the assets of the estate vulnerable to a suit against him personally. The estate is it's own separate legal entity with its own TIN. Only creditors against the estate itself can make claims against it and after all creditors are paid, then the balance is distributed in accordance with the terms of the will. Unless he has commingled assets and treated estate assets as his own, the legal separation should be quite strong.  Whether his personal assets are at risk, remember that the opposition will likely overstate their case to try to scare him into settling. If the business was organized as an LLP or LLC, his personal assets should be pretty safe. If it was a sole proprietorship, he has occasion to worry.