Authorities in South Carolina are looking for whoever shot and killed a US Postal Service worker who was on her delivery route. Irene Pressley, 64, was killed Monday while working in Williamsburg County, per the AP. Coroner Harrison McKnight tells WCSC that Pressley was inside her SUV on Morrisville Road at the time of the shooting. A friend on the mail route, who saw Pressley's SUV towed away, tells the outlet "the whole back glass was shot out" and there were "bullet holes in the front of it." An autopsy is being performed to determine Pressley's official cause of death. Meanwhile, the US Postal Inspection Service is offering a reward for information leading to an arrest and conviction, per WBTW. (More US Postal Service stories.)