Oriel Williams (left) was one of many UMSL students to give up her day off Monday to participate in the university’s MLK Day of Service.

Oriel Williams (left) was one of many UMSL students to give up her day off Monday to participate in the university’s MLK Day of Service.
Oriel Williams (left) was one of many UMSL students to give up her day off Monday to participate in the university’s MLK Day of Service.
Oriel Williams (left) was one of many UMSL students to give up her day off Monday to participate in the university’s MLK Day of Service.
The annual overnight music camp features an immersive four days of singing led by some of the world’s best-known names in a cappella music.