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.
Social media manager Valerie Furlong captured video from the two-day event created to immerse area high school students in the joy of singing a cappella music.