Death/Site - Lee Wallace - Bog

We live in a simulation.
Death/Site, a computer program, gives you access to that simulation.
With it, you can kill anyone for as long as you have their contact information. But if you don't want to kill them, you can predict who they'll murder.
To stop her brother from abusing her, a teenage girl used death/site, but she had to predict two other deaths. If she only knew what would come of the third, she may not have predicted her.
But what came of it would end the lives of many more people, people who didn't need to be killed.
Poor girl; she'll have to live with the guilt for the rest of her pathetic life.