A Boston-area fifth-grader faces potential criminal charges for a violent drawing he made of his teacher.

Cullen Smithson, a 10-year-old from Taunton, Mass., told MyFOXBoston.com that he often gets mad at his math teacher because “she always thinks that I don’t do my work even though I really do.”

Cullen said his mother taught him to express his feelings in his drawings rather than act them out or say things in anger.

But one drawing may have crossed the line. It depicts Cullen holding a gun and shows his teacher and a fellow student with bullet wounds.

The teacher has threatened to press charges and a criminal complaint has been filed, but it isn’t clear yet whether the boy will face any criminal action for the drawing, according to MyFOXBoston.com.

Click here for the report from MyFOXBoston.com.