Classmate testifies about heroic efforts of Kendrick Castillo in STEM School shooting trial
![Classmate testifies about heroic efforts of Kendrick Castillo in STEM School shooting trial](https://video.newsserve.net/700/v/20210529/2105290514-Classmate-testifies-about-heroic-efforts-of-Kendrick-Castillo.jpg)
Classmate testifies about heroic efforts of Kendrick Castillo in STEM School shooting trial
Two years after Brendan Bialy disarmed a gunman at the STEM School in Highlands Ranch, he relived that tragedy in a Douglas County District Courtroom.