casualty notification officer       
noun [ C ] US uk/ˌkæʒ.ju.əl.ti nəʊ.tɪ.fɪˈkeɪ.ʃən ˌɒf.ɪ.sər/ us/ˌkæʒ.ju.əl.ti noʊ.t̬ə.fəˈkeɪ.ʃən ˌɑː.fɪ.sɚ/
 军队伤亡通知官
a member of the armed forces whose job is to tell the family of a soldier, sailor, pilot, etc. that their family member has been killed and to offer support
  The casualty notification officer is usually accompanied by a chaplain. 伤亡通知官通常由一名牧师陪同。 
 Compare: casualty assistance officer
 - More examples
 - A visit from a casualty notification officer is one no soldier's family ever wants to receive.
 - Under Department of Defense regulations, the spouses and parents of all dead soldiers must be informed in person by a casualty notification officer.