If all engineers are held personally liable for their code, when a business has faced a documented rejection, they’ll struggle to hire someone else to take on that risk.
They can always hire another engineer. They only accept it, some times, because they won't find a certified engineer that says "yes", and because they doing it themselves is a crime.
That equates to a huge amount of government intervention on the lives of everybody. And even then, fails way more often than expected.
Now, we are talking about a case where criminal justice failed to uphold the defendants rights to a fair trial. Most probably because of corruption. Do we really want to bring that huge amount of government intervention into this context?