In 2008, when XX was 15 years old, the gang wars in Copenhagen started, and that's the environment he's been a part of.
In November 2013, he stabbed a man on a train in an apparently unprovoked attack, and got arrested.
On February 14, 2015, XX, approached a free-speech debate, held at the Krudttonden Café in Copenhagen, armed with a rifle and fired indiscriminately into the café, killing one person and wounding three police officers.