I believe that in certain "extraordinary circumstances" a priest who has been removed from ministry may perform priestly functions. However, I'm not certain what those circumstances are but life and death situations might certainly be amongst them.
One more question, if I can: Can a priest who has not been removed for some reason, but the accusations and proof is there, receive the Sacrament of the Eucharist himself? Doesn't a person have to be 'worthy' of receiving it?