What investigators found about Germanwings pilot suicide

LE BOURGET, France (AP) — French air accident investigators spent a year analyzing remains and interviewing experts about how and why Germanwings co-pilot Andreas Lubitz intentionally crashed a passenger jet into the French Alps, committing suicide and killing 149 others.

The U.S. National Library of Medicine notes on its entry for Citalopram that children and young adults who take the drug can become suicidal "especially at the beginning of your treatment and any time that your dose is increased or decreased."

A private doctor referred Lubitz, who had suffered from depression in the past, to a psychiatric clinic two weeks before he crashed the plane, warning of a possible "psychotic episode."

Doctors risk prison terms if they violate the rules, except in extraordinary situations.

Because those rules protect patients' privacy even after they die, multiple doctors also refused to speak with crash investigators.

The report says a factor in the crash was a "lack of clear guidelines in German regulations on when a threat to public safety outweighs" patient privacy.