NEW : iReporter interviews man who heard two shots , then two more . Police say man was confronted by agent from Homeland Security . Score: She talked to Grant Huff of Charleston , South Carolina , who heard the shots . 6 McDonald 's employee tells CNN affiliate she heard two shots , began to run .
NEW : iReporter interviews man who heard two shots , then two more . Police say man was confronted by agent from Homeland Security . Score: 6 McDonald 's employee tells CNN affiliate she heard two shots , began to run .