Answer:
True
Step-by-step explanation:
A security threat group (STG) is any group persons with recurring threatening or disruptive behavior (i.e., violations of the disciplinary rules where said violations were openly known or conferred benefit upon the group would suffice for a prison environment), including but not limited to gang crime or gang violence (i.e., crime of any sort would automatically make the group a gang, and as a gang in custody it would logically be an STG).