The plan was so detailed, right down to zip-ties "on the door handles so b-----s can't escape," that a very frightened Catherine O'Connor called the police on her own grandson. "He's planning on having a mass shooting at one of the schools," she calmly told the 911 operator in Everett, Wash. Then there was the matter of the rifle she said she found inside a guitar case in her grandson's bedroom. ~ The entries in his journal were methodical and written in point-by-point detail, police said. They were also chilling in the teen's excitement at the prospect of killing his...