Such a sad event. We all cringe when we hear/read such happenings.
Unfortunately whilst man & machine are interfaced we shall have such outcomes. Whether it be fuel related, mechanical related or even a body failure (heart attack for Eg) we can only hope we each learn from this as well as the many other events that will sadly follow. If it's straight out human error by way of height misjudgment for Eg then we need not judge here as we have ALL made errors.
Flying an aircraft at night in remotely lit area's or in IMC is inherently dangerous as we don't have that one feature we humans rely on so much, our vision beyond the cockpit.
Take care out there everyone whom find them selves in the same position, at night, low (as in the circuit) and with minimal outside cues.Watch that Alt, that Hdg that VSI like a hawk for even the most experienced of drivers out there can get caught by the night stalker!
Wmk2