Martin v. The Queen, 2012 DTC 1253 [at at 3725], 2012 TCC 239 -- summary under Subsection 323(3)

Angers J. found that the taxpayer, who was a director of two corporations forming part of a related group, was liable for unremitted income tax source deductions of those two corporations, but not for a period starting with the initial remittance failures. During that period, it became apparent that the group was in financial difficulty, the taxpayer hired a chief financial officer, a lawyer and a chartered accountant to assist him with the financial crisis. He also made the payment of taxes a priority - he refused to have certain accounts receivables applied to pay suppliers in priority to the remittance obligations. Although payroll remittance failures did indeed arise, the corporations had overpaid GST/HST remittances as a result of poor advice, and the overpayment amounts would have covered the remittance obligations. The taxpayer was liable for subsequent remittance failures because of the finding that his attention was no longer directed towards avoiding such failures.