The Messenger of Allah ﷺ gave judgement that the killer should have what was taken from the man he killed, and did not make this subject to division into fifths. (Using translation from Abū Dāʾūd 2721)
أَنَّ رَسُولَ اللهِ ﷺ قَضَى فِي السَّلَبِ لِلْقَاتِلِ وَلَمْ يُخَمِّسِ السَّلَبَ