Additional evidence or evidence of different kind that supports a proof already offered in a proceeding(noun)
WordNet. Princeton University. 2010.
Use "corroborating evidence" in a sentence
"Instead of identifying women who are known to have suffered sexual abuse based upon records and then asking them if they remember the abuse, psychologist Jonathan Schooler and others have identified women who have uncovered memories of childhood sexual abuse and then found corroborating evidence for the abuse."