Rob Langdon describes himself as an honest man, not necessarily a good man. He was a former soldier working as a private contractor in Afghanistan when he was involved in an incident that resulted in a man's death and saw him facing the death penalty.

‘They told me Celeste’s death wouldn't be in vain. So far, it has been’: Aggie Di Mauro Pt. 2
56:11

'My daughter’s murder could’ve been prevented’: Aggie Di Mauro Pt. 1
59:22

When the prison gates open: Tahlia Isaac Pt. 2
1:06:33