What I find the most interesting about this article is that someone was able to be identified using a picture of their fingerprints. Thus, any photos posted online could be scoured for identification information. And with computer vision technologies becoming more mature, it means that regular video footage of people could identify them the same way in seconds or less using a wide variety of different visual traits.…
It's not clear to me that they identified him that way. It might be that they arrested him due to other evidence, compared the fingerprints afterward, and told him that they could prove the fingerprints matched, whereupon he pled guilty.
It's no unheard of to elicit guilty pleas using less than scientifically robust forensic methods.