The VAMC police interviewed several medical providers who suggested Behles' injuries were inconsistent with a fall and that hospital staff had destroyed important evidence.
The exchange between former Reps. Mark Sanford of South Carolina and Joe Walsh of Illinois was notable given the refusal of all but three Republican senators to criticize Trump's conduct.
The U.S. official and the two people familiar with the matter spoke to the AP on the condition of anonymity because they were not authorized to speak publicly.