A knife in the pocket, adrenaline in the blood and only one dream in mind: to be a gangster - and the biggest one at that. Yehya was 15 years old and close to realizing his dream when he met the filmmaker Christian Stahl in the stairwell. Yehya wasn't just the nice boy from next door, he was also "the Boss of Sonnenallee" - one of the gangster runners of... see more