Hmm, that's a different article. The NBC article fails to mention the twitter stuff and addresses. It says they looked at J. Swarbrick's notes.
I'm loathe to even post about this because it's just so stupid. Grown azz men combing through high school crap like catfishing on-line and college noobs lying about their hot ex-girlfriends/girlfriend "in Canada"
But since you asked, they can check a lot. Because so much of the correspondence was through the Internet they can check every aspect of Manti's story. If he says he met her online @date then they can check that and verify every detail. They can trace the online persona of the scammers and see if they've connected to the other supposed victims. They can rule Manti out as the literal "perp" because they can trace the IP of the posts on a lot of sites to make sure he wasn't the one posting as his girlfriend etc.
Now obviously it's possible that
1) Manti didn't actually perpetrate the fraud but was complicit... in that case there must be an electronic paper trail of him to this perp. How are you going to coordinate the fraud if you have never met in person or online before the date the fraud begins? Assuming "full cooperation" Manti's family would have handed those cell phone records etc for ND to check...
2) It's almost impossible for there to be no inconsistencies in Manti's date and recollections... for IMAGINARY dates no less it would be, I think in real terms impossible. I mean look if Manti could pull that off he would be literally a world class intellect and deceiver no exaggeration. I mean the nation's SPYMASTER David Petraeus the CIA head got busted for an email trail to his mistress... Manti can cover his tracks like the KGB and remember dates and incidents like Dr. Evil?
sure it's possible... theoretically... depends. how hard of a tin foil conspiracy theorist you want to be?
3) ND can check the phone records and evidence that the actual interactions actually happened. I mean ok you can go all Birther, but does any logical person believe that Manti was spending 8 hours a night for months on end on the phone with a fake GF all because he knew in training camp that this would be the year that a defensive player after 100 years of neglect would be up for a Heisman and that he would be that guy??
It's pretty clear that Manti is stupid and that Manti was duped. Strangely this doesn't me believe less in what I thought of him... this guy is a true believer. It's actually kind of sad that when she's just this pretty girl on the Internet she's just another girl to him but what brought him closer to the fraud is when he thinks she almost died and really needs someone to be there for her... Again the entire thing is high school, it debases our entire country and our media apparatus that people are dying in the Middle East and Africa over real hatred and real crime and Bill Simmons and Deadspin can't stop perving out over some kid's screwy love life.