I sat with FedEx child killer Tanner Horner for weeks. I've now looked pure evil in the eye and heard every unimaginable horror endured by seven-year-old Athena. One disturbing act haunts me - he just wouldn't stop

A journalist sat with Tanner Horner, a child killer, and heard disturbing stories about his crimes, including those against seven-year-old Athena. The experience left a haunting impression. The article highlights the horrific nature of the crimes.