Maybe they did. LE sure seems to think this is a valuable tip, and they want everyone to pursue it. They put out a press release. I'm following them. They want to find Dylan.
If LE thinks its a valuable tip, and that tipster contacted LE back then, I would think LE would have started to look for this person back then.
It's now almost 3 months later. How confident this tipster that he or she even got the date right?