Oh
"a former member who has IT skills"
Oh..... is that reason why he is the "hacker"? It reminds me of an ex, which about a month after breakup I received text messages accusing me of hacking her email account.. why was it me? Because I'm the only person she knew who was capable of such a thing.
Got IT skills? It must be you who did the hack!
Although, It wasn't me. I had actually forgotten her email address by that time.