Ben Roberts-Smith's former patrol commander has denied changing his evidence to counteract alleged flaws and inconsistencies that make his story implausible, a court was told.
The witness codenamed Person Five on Tuesday returned to the Federal Court witness box for his fourth day of evidence.
The former SAS soldier is appearing on behalf of his good friend Mr Roberts-Smith who is suing The Age, The Sydney Morning Herald and The Canberra Times for defamation.