Cassandra by Ken Liu
Publication: Clarkesworld, March 2015
Description, by Lois Tilton [Locus]: "A superhero story. The narrator discovers that she has a sort of precognitive power: through touch, she can hear the future thoughts of individuals who will commit acts of lethal abuse. The first time, she doesn’t know what to do, does nothing, and later sees the murder reported on the news, the murder she believes she could have stopped. And it keeps happening. She thinks that perhaps the official superhero [she calls him Showboat] can help, but he disregards her warnings. So she takes matters into her own hands.... "