Wouldn't the evidence be in the commit logs? It's customary in most places to explain what you changed and maybe why, it's not unusual to have a reference to

Wouldn't the evidence be in the commit logs? It's customary in most places to explain what you changed and maybe why, it's not unusual to have a reference to a bug or story or case or something, likewise there is usually a product owner who knows about it. Even if it's just pure cowboy style with a "fixed some stuff" like comment, the context of the change can be looked at. Honestly, this claim seemed like the most tangible one made. I'd say 1 of two things should happen regarding it, either someone else needs to get their walking papers or a pretty substantial apology is owed.