The encounter was caught on video from a West Chesterfield neighborhood home during a break in the girl’s online class.

The microphone was muted on the girl’s computer but the camera was on as a handful of other students were logged in to the Google Meets session.

The teacher was working on a different computer during the pause in class when she heard two other students say, “What is going on? What is happening?”

When the teacher opened the screen back into her online class, she saw the 7-year-old girl with her pants pulled down and Walls forcing her to perform oral sex, prosecutors said.

The teacher reported what she saw to the school’s principal, who called the girl’s family, Chicago police and authorities from Illinois Department of Children and Family Services.

The girl had been staying at their grandmother’s home during the school day.