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Become a sergeant or something and move on? and tom dove says to me, listen, buddy, nobody likes me in my department.od he says, i'm not going nowhere. he says, i got five years to put in your brother's case. he says, i retire and i'm out of here. he said, but i'll give it my all. i will give everything to this case that i have. i looked over at him, i said, you're the man. >> reporter: what david didn't know but clearly sensed was that detective tom dove was the real deal, a legendary law man who seemed to have stepped out of his own primetime drama. >> there wasn't a whole lot to go on. ther...