The Harlem native overcame a very troubled past. As a teen, he fell into a life of crime, but bounced back to become a graduate of the esteemed New York City college.

Her reasoning for going off the grid? "She just wanted to get away from it all. She didn't want to be in school anymore" says a police source.

The police said missing Columbia University student Nayla Kidd apparently changed her cell phone number and bank account. Kidd's distressed family said it's unlike her to miss final exams and not contact her mother.

Likable TV host and health doctor Mehmet Oz has defended his position as a member of Columbia University’s College of Physicians and Surgeons Department of Surgery.…