 Complete the following phrase:  After being taken into custody, Terrell told reporters he just went into a classroom and shot the guys. He then reportedly made a full confession to investigators, saying he had planned an attack for some months. In subsequent statements requesting search warrants from a court, lead investigator Detective Brian Koll of the CMPD wrote Terrell stated he had been planning this shooting for several months and described to detectives where and how he obtained the firearm, research he had conducted on mass shootings, and how he chose this location. In his confession, Terrell reportedly referenced the 