article_snippet.sent: Investigators have focused on Lubitz's health as Investigators try to establish his motivation.
article_snippet.sent: It is becoming increasingly clear to investigators that Lubitz was "very afraid" his would lose his license to fly because of his medical issues, a law enforcement source with detailed knowledge of an involuntary homicide investigation told CNN on Thursday.
article_snippet.sent: It's already emerged that Lubitz had battled depression years before his took the controls of Flight 9525 and that his had concealed from his employer recent medical leave notes saying his was unfit for work.
article_snippet.sent: But the law enforcement source said that after a severe depressive episode in 2009, Lubitz relapsed with severe depression and stress in late 2014.
article_snippet.sent: In the weeks leading up to the crash, Lubitz was shopping doctors, seeing at least five, perhaps as many as six, the law enforcement source said, as his kept going from one doctor to the next seeking help, including from a sleep specialist.