When such things have happened in the past, they've led to an investigation and the appointment of a Public Editor or an Ombud. (e.g. Jayson Blair.)

I'm willing to weigh a post mortem from Ars Technica about what happened, and to see what they offer as a durable long term solution.

There is a post on their forum from what appears to Ars Technica staff saying that they're going to perform an investigation.[0]

[0] https://arstechnica.com/civis/threads/journalistic-standards...