Where do you go after someone kill you?

Answer 1

You don't 'do' anything, you are dead, just hope or pray that before you die your loved ones give you a good send off and your dependants know where your last will and insurance policy (if you have one) can be found.

Answer 2

A: (Islamic perspective)

When someone dies irrespective of the cause of death, souls gets taken by Angels assigned to retrieve the souls from dead bodies. Souls are made to sleep in a dimension known as Barzakh, where they cannot interact with the living world and the living world not with them.

Untill the inevitable day of Judgement these souls will be awaken and restored to their bodies and Allah will judge them and either reward them with Paradise or condem them to Hell.