“The killer does not inherit.”  

عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ قَالَ الْقَاتِلُ لاَ يَرِثُ  

“A woman inherits from the blood money and wealth of her husband, and he inherits from her blood money and wealth, so long as one of them did not kill the other. If one of them killed the other deliberately, then he or she inherits nothing from the blood money or wealth. If one of them killed the other by mistake, he or she inherits from the other’s wealth, but not from the blood money.”  

أَنَّ رَسُولَ اللَّهِ ﷺ قَامَ يَوْمَ فَتْحِ مَكَّةَ فَقَالَ الْمَرْأَةُ تَرِثُ مِنْ دِيَةِ زَوْجِهَا وَمَالِهِ وَهُوَ يَرِثُ مِنْ دِيَتِهَا وَمَالِهَا مَا لَمْ يَقْتُلْ أَحَدُهُمَا صَاحِبَهُ فَإِذَا قَتَلَ أَحَدُهُمَا صَاحِبَهُ عَمْدًا لَمْ يَرِثْ مِنْ دِيَتِهِ وَمَالِهِ شَيْئًا وَإِنْ قَتَلَ أَحَدُهُمَا صَاحِبَهُ خَطَأً وَرِثَ مِنْ مَالِهِ وَلَمْ يَرِثْ مِنْ دِيَتِهِ