Nataley Davis | staff writer Frank Cortazzo has held many titles throughout his life, from substitute teacher to police sergeant on a college campus to a 67-year-old master’s degree candidate. On Friday, he retired from Duquesne after serving students in public safety for 40 years. Cortazzo was working as a police officer in Wilmerding and using his teaching degree to substitute at different schools when … Continue reading After 40 years of service, Duquesne sergeant retires