That I'm aware of :) He also happens to be the most intriguing character in this entire cast. If he is who you suspect, then his appearance with Greta would have had to have been a calculated move. (As much as I like her coverage, we can rule out her enticing charm as the reason he agreed to an interview.)
I think it was calculated and I think Greta is part of the whole team of holloway/twittys who are trying to solve the case. Greta is part of it, you can tell.
And I am glad she is.