BINGHAMTON, N.Y. AP – Jiverly Wong felt tormented by police. They snuck into his room and touched him while he was sleeping, he thought. They stole $20 from his wallet. Because of them, he lost his job. Because of them, he was poor and his life was a mess.

In a rambling, disjointed letter sent to a TV news station, the man who would walk into an immigrant center and gun down 13 people before killing himself blamed his troubles on the police and vowed to take at least two people “to return to the dust of earth.” He ended the letter, neatly written in capital letters, on a chilling note: “And you have a nice day.”