Education Secretary Betsy DeVos on Friday proposed a major overhaul to the way colleges and universities handle sexual misconduct complaints, adding protections for students accused of assault and harassment and narrowing which cases schools would be required to investigate. Her plan would scale back important Obama administration rules while adding mandates that could reshape the campus disciplinary systems that schools have developed over the past decade. Under the new plan, colleges would have to investigate complaints only if the alleged incident occurred on campus or in other areas overseen by the school, and only if it was reported to certain officials.