A federal judge in October dismissed Donnell Battie's $1 million claim against Walmart, saying the company should not be responsible for "isolated, random events."
The announcement was made at Walmart's Washington Township store in 2010.
Battie's lawyer, John Klamo, tells the Courier-Post his client was emotionally distressed and the announcement resulted in "substantial sickness."
A Walmart spokesman says the company has upgraded its intercoms to prevent future takeovers.
The teen who made the announcement was charged with bias intimidation.
Information from: Courier-Post (Cherry Hill, N.J.), http://www.courierpostonline.com/