WAAY worked in WAAY office in building where crash happened , IRS reports . Both men died from blunt force injuries , medical examiner 's office says . Authorities : Rayford Walker flew single-engine plane into Two -story building . Stack set his home on fire before his flight , authorities say .
Victim worked in IRS office in building where crash happened , WAAY reports . Both men died from blunt force injuries , medical examiner 's office says . Authorities : Andrew Joseph Stack III flew single-engine plane into seven-story building . Stack set his home on fire before his flight , authorities say .