Forensic experts have obtained a DNA profile of the unknown killer of a schoolgirl raped and shot dead 62 years ago near Swansea, Wales. Scientists isolated the killer's DNA from a semen stain on the raincoat of the 12-year-old victim, Muriel Drinkwater, and examined linkurl:short tandem repeats; (STRs) on the Y-chromosome. Y-STR haplotypes are often used in linkurl:genealogical testing,; and provide a familial DNA profile that may allow police to track down the murderer or his living relatives. Detectives believe the girl's killer was probably in his early twenties at the time of the murder, so he would now be at least 80 years old, if alive. Even if he is dead, though, the police hope to find a living male relative, in order to at least identify the murderer. No matches were found in the UK's national linkurl:DNA database,; and police are now focusing on around 50 of the...

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