Border boss inquiry time justified: Dutton

Updated February 21 2018 - 3:17pm, first published 3:10pm
Border Force boss Roman Quaedvlieg may have accrued nearly $500,000 salary while on leave (file).
Border Force boss Roman Quaedvlieg may have accrued nearly $500,000 salary while on leave (file).

Peter Dutton has defended a protracted investigation into the conduct of the Australian Border Force boss, insisting he is entitled natural justice.