Airline Employee Steals Airplane

Curious to know how in the world this guy can just take the plane and take off. According to an other article I read (don?t know how accurate the reporting is) he was just a baggage loader and had no piloting experience:

http://www.latimes.com/nation/la-na-stolen-plane-20180810-story.html

Guess the pilot left the keys in the ignition.