There is some case law talking about particularly if the
parent has the right to counsel and whether DCF should interview the
allegations and whether that would violate both federal and state
constitutional rights to have an attorney. 
There have been cases where even if the parents have made a full
confession to DCF that that has been suppressed in the criminal matter.  Most of the DCF offices are having the worker
interview the parent but not talking about the allegation. You want to be very
careful and want to balance what can be a negative adverse inference against
the parent for not meeting or not speaking to DCF and it is very important that
there is any possibility of any criminal charges while DCF is ongoing that you
speak to an attorney before deciding whether to cooperate or not cooperate with