Then, 10 letters later, Rader sent a package asking to chat with the police. "Can I communicate with Floppy [disk] and not be traced to a computer. Be honest,” Rader wrote. If the answer was yes, the police were to place an ad in the Wichita Eagle with the code, “Rex, it will be OK.” Rader got the message and subsequently sent a floppy disk to KSAS-TV.