What happens after death?

[Romulator]

I believe in the Ghost Trick theory
When you die, you become a ghost, and using that ghost, you can stop other people from dying by manipulating the events around them which occured 4 minutes before their death.

Its kinda difficult to put into words, so, example:

Someone dies because a robber shot the person while attempting to rob a bank.

Because the person died because the armed robber shot a bullet at him, all you have to do is either prevent the weapon from being shot, or something along the lines of removing the ammo available to the man.
Assume the start of the robbery occurs at 11:32pm, the man is shot at 11:34pm. This gives you at least 4 minutes to stop the shooting of the man before and during the robbery.

Because you cant just communicate by actually saying "Dont shoot him, coz I'll prevent it", you make a distraction or do something directly to the weapon, like turn on the Safety.

The issue with this is that you cannot prevent your own death; else, it questions if you really died or not