DAYS BEFORE Memphis Police officer Timothy Warren was viciously gunned down and killed in a downtown hotel, he feared he would die. According to the MEMPHIS COMMERCIAL-APPEAL the veteran cop told his wife Betsy:"I have a feeling something really big is going to happen. It's going to happen Downtown. It's going to happen really fast. Betsy, I have a feeling I'm going to be right in the middle of it. It might 