Police allege Braeden Phillips, 20, had planned to commit a mass shooting at State College High School in Central Pennsylvania on April 21, one day after the 26th anniversary of the deadly Columbine High School shooting, according to a criminal complaint. Police allege Phillips had compiled a "hit list" and that the shooting would have taken place at around 8:40 a.m. -- a high traffic time for students and staff -- near the school's main staircase. Officials cited in the complaint allege that Phillips planned to place bombs in the school bathrooms.