For those of you that just don’t get the legal ramifications of this...here is one example of Murder/suicide and the estate.
https://www.avvo.com/legal-answers/stepfather-shot-and-killed-my-mother—then-killed—991937.html
Btw, here is a even more interesting legal entanglement that could happen.
What about life insurance when the mother is killed first by a suicided spouse?
http://www.thefederation.org/documents/schuman.htm
Does the life insurance now go through the husband and his heirs if different than the mother’s will.
Example
1 million life insurance policy.
X kills Z. Does X get the life insurance policy as beneficiary because he lived longer than Z and now it goes to X’s heirs.
I am sure there is something on the books for this one.