It seems to me that this whole episode has shown Mason Doyle to be quite naive.
What did he expect when he joined this forum?
I noted that Caroline mentioned yesterday, that she and Mason Doyle were well familiar with each other. Coupled with a remark that MD made yesterday about Jeremy being an alleged MoJ, it made me wonder whether Mason Doyle had helped, in some way, to change Caroline's mind about Jeremy's guilt.
Of course, I may well have put two and two together and come up with five!