FOR YEARS, IVE BEEN pretty sure that I did not murder my wife, Simpson said today at a golf course in Boca Raton, Fla., where he was taking a rare break from searching for the real killers of his wife. But if Johnnies not 100 percent sure, Im like, hey, maybe I better take another look at this. Simpson added that it would be crazy not to be swayed by Cochrans new statements, which he called thought provoking. Look, youre talking about a guy, Johnnie Cochran, who is a pretty smart guy, Simpson said. If he said maybe I did it, then maybe I did it. Cochrans doubts about Simpsons innocence may help resolve one lingering mystery for the former Heisman Trophy winner: why it has been so difficult for him to find his wifes real killers, whom he pledged to hunt down after his acquittal in 1995. The former NFL star said that, in light of the new revelations, he may slow down his search, which he said has occupied almost every waking moment of his life for the past seven years. If it turns out that Im actually the one who did it, then looking for the real killers would be a big old waste of time, Simpson said.