Gary Greenwood pleads guilty to arson fire of vacant store that injured firefighter. On July 1, 2011, Deputy State Fire Marshals and Special Agents with the ATF investigated a four alarm blaze at the Stop & Go Mini-Mart and gas station located at 521 & 523 South Main Street in Federalsburg. The blaze was called in at approximately 3:50 a.m. by a passerby. The fire heavily damaged two connected masonry structures.