Armstrong waited too long to come clean, and it wasn't until months after he lost his final fight with USADA and the United States legal system that he decided to do so. The obvious reasons for coming clean now have sullied whatever truth Armstrong is trying to tell; he missed his chance for forgiveness.
Te'o still has that chance. If he hid the truth during his Heisman run, was in on the gambit after initially being tricked or was the mastermind of this elaborate fraud the whole time, he still has the chance to get out from under this. He just needs to do it now.
And it behooves Te'o to do it live.
Allowing a network to tape an interview gives them the chance to take his words and dig into each comment to provide proper context. In most cases, editing is the friend of the show, not the subject.
Doing an interview live also allows him to get his own words out before leaks of what he said emerge and people can challenge what he said, making the remarks look far worse once we see them for ourselves.
The last thing Te'o wants is what happened to Armstrong: an updated version of the truth coming out before America has a chance to hear what he has to say. Taping on a Monday to air on Thursday doesn't work.
Again, he needs to do it now.
Having worked in sports PR for more than a decade (and witnessing firsthand a few of the bigger college sports scandals in recent memory), I have never once seen the "duck and cover" method work.
Neither hiding the truth nor hiding from the truth will benefit Te'o. Look what it's done for Armstrong.