Department of Veterans Affairs Secretary David Shulkin was challenged Monday by a VA whistleblower who asked why he was still facing retaliation by the department, even though VA policy prohibits actions against officials who highlight problems within the agency.

Shulkin met with VA officials in Montana to tour the Fort Harrison facility, and later participated in a question-and-answer session. That’s where Greg Chiles, a veteran and VA police officer, asked Shulkin why retaliation against him is not being stopped.