A student accused of opening fire at a Colorado school reportedly told investigators that he targeted peers who made fun of him for his gender identity, court documents show. Alec McKinney, 16, and Devon Erickson, 18, allegedly decided to carry out the shooting after exchanging messages on social media the day before the May 7 attack at STEM School Highlands Ranch near Denver, the documents show. The shooting resulted in the death of 18-year-old Kendrick Ray Castillo; eight others were injured. The police records, which were unsealed Thursday, show McKinney telling officers in an interview that he intended to “shoot...