Investigators are intensifying their efforts to locate missing University of Missouri student, Riley Strain. Newly released surveillance video footage captures a concerning moment. It shows Strain stumbling near Second and Church Streets, before regaining his footing and continuing on his path. Moments later, another video timestamps him crossing First Avenue North, approximately a quarter mile from where he was last seen. Since these sightings, there has been no further contact with Strain. St. Louis News: FOX 2 covers news, weather, and sports in Missouri and Illinois. Read more about this story or see the latest updates on our website https://FOX2Now.com Follow FOX 2 on social media: YouTube: https://www.youtube.com/FOX2Now Facebook: https://www.facebook.com/FOX2Now/ Twitter: https://twitter.com/FOX2Now/ Instagram: https://www.instagram.com/fox2now/ TikTok: https://tiktok.com/@fox2now SnapChat: https://www.snapchat.com/add/fox2now