Carl Persson has some wrong methodology. When the suspect was interviewed by local FBI they determined a serious mental problem and local authorities (APD) which is very familiar with the API requirements for evaluations or emergency mental commitments or court ordered commitments took proper action. The evaluation should sill be available at API. And as Carl should already know mental commitments and an adjudication of mental disorder are a preclusion to possession of firearms.That is current Federal law. APD used due diligence in assisting FBI with transport and APD has legal rulings they must follow on their determinations and any forced commitment.

The Federal transport regulations were followed as were regulations on ammunition in luggage as many thousands of law abiding citizens and hunters follow every day  traveling with firearms.

Where to lay the blame? That is all the radical anti-firearm people will blather about now. We have innocent civilians dead and injured.