Her statement was legally correct. Being a lawyer, she may have been trying to inform you a defendant who is found "not guilty" in a trial may not be innocent. Think O.J. Simpson.
On the other hand, she probably would also say some people who are found "guilty" are actually innocent.
Don't read too much into her comment.
Judge Judy snapped at some guy with the same type of comment when he said he was "found innocent".
Good thing it wasn't me as I would have blown up, along with my case. My reply" This is America. In America, a person is innocent until proven guilty - ergo I was not found guilty, so I am innocent. Stating there is a difference implies that I am guilty, the ambitious prosecutor just didn't have his act together. It is this kind of semantic tap-dancing which makes the public distrust the legal profession."