Law enforcement officials say Mercer left a note at the scene of the killings. They say the multi-page typed note was a philosophical rant of someone who was mad at the world. The officials say Mercer lamented the fact that he did not have a girlfriend.
[He] felt the world was against him [and that he would be] welcomed in Hell and embraced by the devil. He wrote that he was ‘in a bad way. He was depressed, sullen. He said he had no life. He felt the world was against him.