Not an outright admission, but close.
http://www.religionnewsblog.com/4006/dr-laura-renounces-jewish-orthodoxy
By the way, the term "Jewish" refers to culture OR religion.
She did not outright state that she had converted to Christianity. Moreover, Al Simmons's statement is still not invalidated if he was speaking of events that transpired before 2003, and you have provided no evidence to show that he was speaking of a later time.