blood money 
noun [mass noun]
1Money paid in compensation to the family of someone who has been killed.If the woman's family wishes the murderer to be executed, they must first repay half of the family's blood money....
- They spoke frequently of fasil or blood money - that's compensation to you and me.
- He offered what amounted to blood money to the girl's family.
2Money paid to a hired killer.One quarter of those will die before they can claim their State pension, which pours yet more blood money into government pockets....
- These were the tools of hired killers; men who were paid in blood money and didn't give a damn who they had to cut down to earn their fee.
- If we don't like the way it operates, we have the right - as stakeholders - to ensure that we don't retire on a pile of blood money.
2.1Money paid for information about a killer or killing.He also feared it might be viewed as ‘paying blood money to what are termed informers, an anachronistic view still adhered to by certain elements of the population’....
- Prove that it's not true… then we'll know you've really earned your blood money.