There are many cities filled with facial recognition. London, Amsterdam and Berlin at the very least. Hell, Beijing has facial recognition in that massive city. Amsterdam is even replacing most camera's with voice recognition. The wrong words (boom, terror, kidnapping, kill, death, missile, IED, etc) will alert a guy that can send Marechaussee. Where Etika lives I promise you they can follow him everywhere they want except for maybe a few blind spots.
Surveillance is very advanced. They can find him if they want to. Unless Etika took precautions and does not want to be found. Take bright white sneakers, big gaudy coloured logo shirt and other clothes that will be easily followed on camera, backpack inside plastic bag, go out as Etika, travel 1 direction, find a place where nobody could possibly be watching you, shave head, put on other very bland generic clothes, change direction, put on the really dark skiing sunglasses or the present everywhere Rayban Aviator copshades, a cap, and there you go.
He could have done it if he thought about it. If he did think about it to the point camera's will lose him I doubt he was off his rocker at that time, which means it sort of was a suicide threat and not an attempt I think. Assuming they took out the time to even let the computer look for his face in all of the footage, such queries do not take just 1 minute and there are likely other people they want to find first, like that serial rapist suspect or arsonist that killed a family of 5.