Slant six not starting.

I have done the above and still nothing. My brother in law had stuck his finger in one plug hole to find tdc and with no spark plug in it fired and shot his finger out of the hole. after this happened we have dialed the timing in and it wont fire. We checked compression last night and after all that happened we have lost compression and it is barely there. We have done all we know to do and have no clue where to go from here.