Ok, so we have rules for Grey Knights coming out in Deamon Hunter, and it has to be asked "Are Grey Knights ever seconded to the Deathwatch"?
I see nothing cannonwise that says either way, and I don't as of yet have an opinion, but these are two sides I see to it-
FOR- Though their focus is the Xenos, some Xenos are aligned with the Gods of Chaos. Thus, it wouldn't be beyond reason that their might be a couple Grey Knights seconded to the Deathwatch at anytime.
AGAINST- There simply isn't enough of them, they are constantly deployed all over the Imperium as it is, and the nature of their main enemy means that they probably are never at full strength as it is.
Thoughts?