Jennifer Kirkland's comments about her son, Ethan, came in an interview with Dr. Phil McGraw for the "Dr. Phil Show." It's set to be aired Wednesday; a clip already is posted online.
Kirkland says her son saw officers shoot the gunman identified as 65-year-old Jimmy Lee Dykes of Midland City.
She quotes him as saying: "'The Army came in and shot the bad man.'"
The FBI says agents wearing combat gear entered Dykes' bunker on the sixth day of the standoff in southeast Alabama. He was shot multiple times.
Authorities say Dykes shot and killed Ethan's school bus driver before grabbing him.
Ethan wasn't physically injured.