In a taped interview with Katie Couric, which will air tomorrow on that host's talk show, Manti Te'o admits to at least one time when he lied about the existence of his girlfriend, Lennay Kekua.

Asked by Couric whether he was in on the hoax, Te'o says no - but he did mislead reporters on two occasions after receiving a call on December 6 from someone claiming to be Kekua, who Te'o thought to have died two months earlier.