This is certainly possible, but almost always when I dug deeper I'd discover that the person was showing abnormal thoughts or behaviors even before the head trauma, and that therefore the head trauma was likely a "red herring, " meaning an event that appears to explain something but in fact doesn't.
Loretta Lynch, head of California's PUC, calls the safety argument "a total red herring" and says El Paso probably profited from higher prices in ways the judge didn't see.