Detailed text transcripts for TV channel - CNN - 20100712:17:48:00
Philadelphia. a tug toying the barge. the duck boat crew telling investigators they tried to reach the other crew when they saw the vessels getting closer together. but there was no response. now to crime and consequence. dna helps los angeles police catch an alleged killer who has been eluding them for a quarter of abcentury. the man police believe to be called the grim sleeper was brought down by cutting-edge technology that looks for a family resemblance in dna. cnn's thelma gutierrez takes us inside the crime lab where a crust of pizza helped to crack this cold case. >> reporter: behind ...
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