LOS ANGELES (AP) - Ten years after he was acquitted of killing his ex-wife and her friend, O.J. Simpson was back in Los Angeles - autographing sports memorabilia for people attending a horror movie convention. Simpson acknowledged it felt "strange" to be signing autographs in such venue, but said it didn't occur to him that the date nearly coincided with the 10th anniversary of his Oct. 3, 1995, acquittal on charges of murdering his ex-wife Nicole Brown Simpson and her friend Ronald Goldman. "I don't keep these dates in my head," Simpson told The Associated Press on Friday as he...