Controversial Arizona lawman Joe Arpaio, who styles himself as “America’s Toughest Sheriff,” has enlisted action film star Steven Seagal to lead a training exercise for members of his armed volunteer posse on how to respond to a school shooting, Reuters reports. The training event will involve six instructors leading 40 armed volunteers through a simulated shooting on Saturday, with teenagers acting as students, the sheriff’s office said in a statement. Seagal will lead the training run, focusing on various aspects of shooting scene management, including “entry room tactics and hand-to-hand tactics,” according to Arpaio’s office. Arpaio, known for his tough stance on illegal immigration, dispatched members of his volunteer posse to patrol schools last month in the wake of the gun rampage that killed 20 children and six adults at a Connecticut elementary school in December…