My father was killed by his unfaithful wife, who conspired with some people to kill him.
The criminals were sentenced to death, among whom was my stepmother and her partners in the crime. I would like to ask Your Eminence whether my stepmother has a right to inherit from my father or not. It is worth mentioning that she bore my father sons and daughters.
If the reality is as you mentioned, your stepmother who conspired with some people to kill her husband has no right to inherit from him. However, her sons and daughters have the right to inherit from their father. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.