Bridget Canaday en Two Southern Boone County school leaders resign following scathing letter <p>A school district official says Southern Boone Middle School Principal Bob Simpson released a letter of immediate resignation this morning. The move comes after Simpson was placed on paid administrative leave Thursday morning. Fri, 22 Jun 2012 20:26:23 +0000 Lukas Udstuen & Xiaoyun Wu 16369 at