It is looking more and more like he did it himself:
http://deadspin.com/5976517/manti-te...ason-is-a-hoax
Quick notes on the link:
Looks like this kid created a ficticious GF online. She then died of cancer sometime last year - and he looks like a hero playing football the day after. Now he claims that he was the victim of a hoax - and that she was only an online GF and never met her.....ok, that part could be believable, but what is a bit inconvenient for Mantai is that they used a real girls pic. This girl as a favor to a friend of hers took a pic of herself with some sign/message.
She didn't think anything about it until months later she sees her pic all over the Internet with captions that she died of cancer and was Mr. Te'o's gf. She contacts the guy who asked her to pose......long story short - this guy is a childhood friend of Mr. Te'o.