The district attorney's office in Jefferson County on Tuesday formally filed four misdemeanor charges against the semi-truck driver in the deadly crash on Highway 285. The Colorado State Patrol (CSP) said Ignacio Cruz-Mendoza, 47, lost control of his truck June 11 on Highway 285 near Conifer. Cruz-Mendoza's semi went off the edge of the road, rolled onto its side and dumped its load of pipe and angle iron on top of five other vehicles. Troopers said speed is being considered the primary factor in the crash. Read more: https://www.9news.com/article/news/crime/fatal-crash-highway-285-suspect-semi-driver-charged-misdemeanors/73-90fee698-8f7a-4b6b-9ddd-80b04684c290 ----- More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.