Paul Flowers "begrudgingly" complied with the investigation into allegations he claimed £75,000 of false expenses during his time as trustee at a drugs charity, according to its chief executive.
Reverend Paul Flowers left the Lifeline project in 2004 after allegations over his expenses surfaced.
"I spoke with our treasurer at the time and we then involved our solicitors and, to cut a long story short, in June 2004 I raised the matter formally, fully and in depth with our trustees body," Ian Wardle told Sky News.
Mr Wardle said the trustees subsequently suspended Rev Flowers before an investigation into the claims was launched.
Mr Flowers' response to the claims was "not a lot" and he complied with the investigation "begrudgingly", Wardle claimed.