Investigators said River Smith, 21, purchased auto sears and grenades from an undercover FBI agent. https://www.kare11.com/article/news/local/courts-news/pro-mass-shooting-man-from-savage-sentenced-to-80-months-for-illegal-weapons/89-2fa8b46b-cff6-495c-8666-3d5d06163d1a Welcome to the official YouTube channel of KARE 11 News. Subscribe to our channel for compelling and dramatic storytelling, award-winning investigations, breaking news and information you can use. » Subscribe to KARE 11 on YouTube: https://www.youtube.com/subscription_center?add_user=kare11 » Watch more KARE 11 video: https://www.youtube.com/user/KARE11/videos » Visit KARE11.com: http://www.kare11.com/ » Download our mobile app! https://www.kare11.com/app » Get KARE 11+ on Roku, Fire TV, Apple TV: https://www.kare11.com/roku » Find KARE 11 on Facebook: https://www.facebook.com/KARE11/ » Follow KARE 11 on Twitter: https://twitter.com/kare11 » Follow KARE 11 on Instagram: https://www.instagram.com/kare11/