From a knowledgeable individual at TDO:
"Just to collaborate the People Magazine story, there is a record of his purchase and the use of a ticket for himself and a female Guest Noor Salman (who has been identified as his current potential wife, not the ex-wife) in April. It's likely his son was there, but no purchase was made since he was possible under 3. No other reservations were made (FastPass, resort, dining, recreation, etc.) His motive or intent I cannot vouch for, but they definitely do have investigators combing through all photos/videos captured."
My words now: it is not known whether this is the threat that started the metal detectors, but, if so, our leaders and law enforcement failed in such a horrific fashion that you have to wonder if they are capable of stopping any threats.
Detectors will be compulsory for ALL visitors just as soon as Disney (and likely UNI and SW) can make it workable. And your days of bringing food and beverage into the parks are done, so plan on that.
The days of bringing in everything but the kitchen sink in those double-wide strollers are likely done as well.
And, no, I don't think any of this could possibly prevent a true evildoer from committing mass murder at a theme park, but you gotta admire the thought process that people are ignorant enough to think this means business.