Hasan al-Basri (may Allah have mercy on him) said that the Messenger of Allah (peace and blessings be upon him) said: "Whoever takes blood money and then kills, I will never pardon him."
This is munqati' (its chain is broken), and it has also been narrated with a connected chain.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 16045