A middle school student claims a substitute teacher provoked a verbal argument about a Thin Blue Line flag on a mask the boy wore to his class.
The incident took place at Lyman Gilmore Middle School in Grass Valley, California, and was recorded on cellphones by other students Monday, CBS Sacramento reported Wednesday.
Thirteen-year-old Lucas Lillar said he was in his math class when the substitute teacher sat down at a desk behind him and allegedly provoked an argument about the image printed on his mask.
The “Thin Blue Line” looks like the American flag but features a blue stripe to show support for law enforcement officers.
Lillar’s father and stepmother work as members of law enforcement and he said he wears his mask to honor them.
In video footage obtained by the outlet, the substitute teacher apparently…