necessarily

Well, now, to continue our supposititious case, the couple—not necessarily a guilty couple—realize after the murderer is gone that they have placed themselves in a position in which it may be difficult for them to prove that they did not themselves either do the deed or connive at it.

This adjoins the lower part of the governor’s apartments, and were we to work our way through, we should only get into some lock-up cellars, where we must necessarily be recaptured.

"But surely," said I, "the vampire was not necessarily a dead man?

Incidentally, I may tell you that we are doing the reverse of what you very justly blame, and that we are endeavouring to prevent anything like public exposure of private matters which must necessarily follow when once the case is fairly in the hands of the official police.