Venator, Sharia law allows for the payment of Blood Money or Diya
This means that a murderer can buy his way out of punishment by paying sufficient money to the victim's family.
https://en.wikipedia.org/wiki/Diya_(Islam)
Typically the amount of Diya to be paid depends on the sex of the person who was killed, a woman's life is worth only 50% of a man .
Also Diya is only supposed to be paid if the victim's family agree. But in practice if a very wealthy and important man kills someone , a Royal Prince for example , so much pressure can be put on the family that they are forced to accept. It is generally known that at least one member of the Saudi Royal family has killed several people and had the families forced to accept Diya. He has literally got away with murder.