Complex sentence: Welch revealed that he had already confirmed Fisher's one-time NLG membership some six weeks before the hearings started; after Fisher admitted his membership to Welch, it was decided to send Fisher back to Boston.
Split into simpler sentences: Welch revealed that he had already confirmed Fisher's one-time NLG membership some six weeks before the hearings started. After Fisher admitted his membership to Welch, it was decided to send Fisher back to Boston.