6 things to know about co-pilot, Andreas Lubitz who crashed the plane

In the wake of the Germanwings crash in the French Alpswhich claimed 150 lives, several speculations were at play as to what could have caused the crash.

From a terrorist attack to a possible fault in the flight system, several angles were explored. But as of today, investigators have revealed that the plane was infact deliberately crashed by none other than the flight's co-pilot, 28-year old Andreas Lubitz.

Carsten Spohr, the Head of Lufthansa, the German carrier that owns Germanwings said the 28-year old was "100% fit to fly without any caveats".

So what could have led the seemingly harmless Lubitz to kill himself and the 143 other people onboard the plane?

Here are 5 things we know for sure about the fated Germanwings co-pilot.

1. He joined Germanwings in 2013 straight out of flight school and worked as a co-pilot or first officer since then. Sources say he seemed pleased with the job.
2. He started training to be a pilot in 2008, at Bremen andArizona. His training was briefly interrupted 6 years ago but resumed after "the suitability of the candidate was re-established".
3. He lived in Montaubaur, near Frankfurt, reportedly with his parents and had many friends.
4. His Facebook profile suggests he was a keen runner and had an interest in pop music
5. He had 630 hours of flying time and was regarded by friends as a normal, friendly man.
6. He was a member of the flying club Luftsportclub Westerwald, since he was a teenager.