Provided by Maria Castillo via InstagramKendrick Castillo A judge in Douglas County on Friday handed down a mandatory sentence of life without parole to the second of two gunmen convicted in the STEM School Highlands Ranch shooting in 2019 that claimed the life of 18-year-old Kendrick Castillo. Castillo’s father, John Castillo, said the end of more than two years of court proceedings has provided a little bit of closure. “It’s bittersweet,” he said.