Q: Can a disbeliever inherit from a muslim?
Q: Can a Muslim inherit from a disbeliever?
Q: Can a believer inherit form a murtad (person who let go of islam)?
A1) a disbeliever cannot inherit from a believer
A2) although according to the majority a muslim cannot inherit from a disbeliever, Imaam malik allows for a believer to inherit from a disbeliever.
A3) Although Imaam Shafee and Malik do not allow for inheritance from a murtad (renegade), Imaam Abu Hanifa states, one must evaluate the part in which the person was a disbeliever, and the part they were believers. The money made as believer can be inherited from, the remainder no.
Allah Certainly Knows Best.
(See sharah of miskaat)
sorry for delay in response