Questions about Joe and Jill Bidens’ “Catholic” wedding

“I thought the fact that Jill was married before had no relevance,” said Joe Biden shortly after being married to Jill, a divorcee, at the United Nations Chapel in 1977. Was there an annulment? Fr. Gerald Murray, a canon lawyer and pastor of the church closest to the U.N. says parish files contain no files pertaining to the marriage/annulment.