It is unclear what kind of help you are looking for? Why do you want to have the body exhumed? Is it a personal injury concern? Wrongful death? You mentioned a caretaker committed fraud, but what has that to do with an exhumation?
You need to speak to an attorney, but I think that an estate or probate attorney (or issue) may not be your primary concern. You should consider contacting the Chicago bar referral service and ask for a fraud attorney. They usually have some basic understanding of...
This is very complex and you will need to hire an attorney to determine whether the settlement agreement was breached and what the appropriate remedy is. Is sounds as if you are handling the matter yourself. Once you seek court action, if you make a mistake, it will actually delay the resolution.
As a practical matter, you may technically be entitle to a court remedy, but it may slow the process down. An attorney familiar, not just with the law, but local practice can help you with this.
Without a written agreement at best there will be confusion at the time of your father's death unless his Will precisely reflects your agreement with him. If the house is yours in all but name, it is a good idea to have it conveyed into your name at least as joint owner.
Absent some unusual circumstance, you are going to have to hire an attorney in the state where the probate is taking place, assuming the property is there as well. It is easy to make that determination by speaking to a lawyer.
Your question is not a legal one per se, but if your sister is filing demands with no factual or legal basis she can be held accountable by the court. Unfortunately there is no cure nor preventative for an angry or irrational person.
The real issue here is whether your mother has capacity to make decisions on her own. If she does, she can revoke the power of attorney if she feels she is being mistreated. If she does not have capacity to make decisions, then you should retain an attorney and seek guardianship of your mother through the court.
An attorney can give you guidance on what is capacity and assist you in unwinding this.
The real problem, as opposed to the real issue, is that capacity, the ability to make...
While one has to see the entire trust document to answer conclusively it appears you have no right to compel a distribution. Spendthrift trusts are generally designed and applied so that credit card debt and loans on a home are not paid from trust principal.
Also, what are the ascertainable standards? Health, education and support? Welfare? Are the standards to be construed liberally or conservatively?
Another issue, who is the trustee? Have you the right to replace the trustee?