A Most Amazing Connection

After the funeral the keeper went to a meeting at Panera Bread in Northgate.  While she was picking up the order, she was stopped by a man ( who was not part of her meeting group) who asked her name because she looked so familiar.  When he introduced himself, he told her that he had written a letter (supportive) to the PI about her in 1990. She never met the writer, but always wondered why someone who didn't know her would take the time to write. They agreed to get together soon. Will the mystery  be revealed after 21+ years?