Well, based on the timeline, he was certainly attempting a landing. I can see a couple of options here. One, and most likely the case, is he was not in radio contact with tower on an IFR approach. So, if that is the case, how could tower had known he was there? Can you imagine the horror that could have added to the mix if he crashed on the runway without tower knowing of the attempted landing and then another plane in IMC conditions (night and fog) was cleared to land and then impacted the debris field while trying to slow down after successful landing!
TeaSea. the article reports that this tower is open 24/7. So, I don't think it would have been legal for him to operate as though he was landing in Class E airspace (for those who don't know, this is what Class C or D reverts to when the control tower is closed, and in the ATIS or AWOS report, it announces this). But, even if he made this error, he should have been on an IFR clearance when attempting to land at an airport during IMC conditions, which according to the article was the case. Therefore, the protocol is for the pilot to contact approach control soon as possible after successful landing to advise he was safe. Absent that call, approach control is then supposed to initiate emergency actions, to include shutting down the airport until it can be scanned to see if the pilot crashed.
Ken