Complex sentence: The inquiry was now working on three fronts: association with criminal intent, stock manipulation and embezzlement, insofar as Fiorani would have subtracted money from current accounts of the clients of his own bank.
Split into simpler sentences: The inquiry was now working on three primary accusations: association with criminal intent, stock manipulation, and embezzlement. The embezzlement stemmed from Fiorani taking money from current accounts of the clients in his own bank.