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COLUMBIA, S.C. — A high school senior had supplies for a bomb attack on his school and detailed the plot in a hate-filled diary with maps of the building and admiring notes about the 1999 Columbine High School killers, authorities said Sunday.
Ryan Schallenberger, 18, was arrested Saturday after his parents called police when 10 pounds of ammonium nitrate was delivered to their home in Chesterfield, said Police Chief Randall Lear.
Ammonium nitrate was used in the 1995 Oklahoma City bombing that killed 168.
The teen made a tape to be played after he died, explaining why he wanted to bomb his school. “He seemed to hate the world,” Lear said.
