Former mercenary Karl Thomasson returns once again as a substitute teacher, this time to infiltrate a military school's faculty to cease the actions of white supremacists.Former mercenary Karl Thomasson returns once again as a substitute teacher, this time to infiltrate a military school's faculty to cease the actions of white supremacists.Former mercenary Karl Thomasson returns once again as a substitute teacher, this time to infiltrate a military school's faculty to cease the actions of white supremacists.