I am former Army Officer (MOS 14A). If he was indeed an Army IT Specialist, it is most likely that his MOS was 25B. Normally, Battalions have a few of these Soldiers assigned to them in a supporting function as well as an Office or Senior NCO as head of that "shop". In my experience, the newer 25Bs were normally fairly intelligent (you need a higher ASVAB score for technical specialties), but fairly useless until the got the real on-the-job training that only experience can bring. Him not completing his initial commitment could be several things: disciplinary issues leading him to be chaptered out, a medical issue that made him permanently non-deployable and he was Med-Boarded out, failure to meet standards to maintain appropriate security clearance, extreme personal hardship (not likely), or becoming a single parent with no one to take your kid if you deploy. I'm gonna make a guess and go with medical or he had disciplinary issues. I find it interesting that they are referring to him as a "former Soldier" rather than a Veteran. I think thats the media doing what it does.
When a Soldier or former Soldier is arrested and its a national story, the FB and other social media groups that I belong to will light up with all the Soldiers who went to Basic, AIT, or were in the same unit with him. What they have to say will tell a better story than his DD214.