The story of Manti Te'o and the hoax surrounding his supposed girlfriend's death has been in the news for less than 24 hours at this point, but stories are already starting to come out that people around the Notre Dame community knew something wasn't quite right about this story for a while now.
The story by Tyler Moorehead at CollegeSpun would indicate that other members of the Notre Dame football team didn't buy Te'o's dead girlfriend story, and saw it as a publicity stunt to fuel his Heisman campaign. Moorehead is of the belief that Te'o got caught up in the deception unwittingly, but kept it going, perhaps out of fear of being publicly embarrassed, or maybe seeing it as an opportunity to take his story to the next level.
It's certainly possible that stories like this are true, and people knew something wasn't right about Te'o's relationship. It's also possible that people are mad at Te'o for making a fool of them after they bought in so hard, and seizing the opportunity to come back at him for making them look bad. At this point, the only thing we really know is that somebody was fooled into believing a fake person had died. We'll find out soon whether Te'o was fooled along with the rest of us.