In my opinion this person being only 19 should be taken into custody for being in proximity of all 3 attacks and be held for a period no less than 30 days for his own good to deter his world travels and prevent him for showing up at the next event. He has been injured in 2/3 but it doesn't mean he isn't some kind of collaborator or someone with extremely shitty karma.
Source
http://metro.co.uk/2016/03/23/brussels-attacks-teenager-also-survived-boston-and-paris-bombings-5769552/?ito=facebook