Firefighter Jeffrey Smith was killed in the attack on the World Trade Center . Walz , 37 , was last seen in the north tower . Of the 2,753 people killed in the attack , more than 1,100 people have not had remains identified , according to Barbara Sampson , acting chief medical examiner . His remains were identified by city medical examiner 's office .
Firefighter Jeffrey Smith was killed in the attack on the World Trade Center . Walz , 37 , was last seen in the north tower . His remains were identified by city medical examiner 's office .