The Voice in the Dark

Blake Morrow is an investigative journalist. He ignores the anonymous text message - a name, an address, a promise of death. A prank. Until the news reports the murder the next morning. A second message. A second death. Blake goes to the police. They tell him to keep the sender talking. The voice on the other end claims to be a dead serial killer. Then the third message arrives. This time, the name is Blake's.
And the voice says: You know why.