I seriously doubt this engineer was operating without code review, test infrastructure, and other safety checks in place. They aren't solely responsible. If th

I seriously doubt this engineer was operating without code review, test infrastructure, and other safety checks in place. They aren't solely responsible. If they don't have those types of checks in place, that's the fault of the company. If someone want's to sue over this, then sure, sue the individual (and the company). But as a manager in company, I would not not punish the individual. I would have them conduct a thorough post mortem and look for ways to avoid problems like this in the future. People do learn from their mistakes and that is valuable.