substantiating

The unexpected search of Wingie's cell discovered the tobacco, thus apparently substantiating the charge.

The controversy raged for a time, but without substantiating Pugin's claim.

There was a letter from Stephen Lorimer, grave and distressed, substantiating everything that Jimsy had written.

Her maid had just written the intelligence, enclosing the documents from the authorities substantiating the fact.

Or, at least, something would have been done towards substantiating those claims.