Baltimore County school board member Roger Hayden, who previously served as county executive from 1990 to 1994, has died. County executive Johnny Olszewski commented on Hayden's death in a statement on Thursday. From The Baltimore Sun: “A dedicated public servant and tireless advocate for public education, County Executive Hayden exemplified what it means to give back to our communities," Olszewski said. "Baltimore County is stronger for his service and my sympathies and prayers are with…