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Arrest in Grim Sleeper case leads to new row over family DNA tests

The ethical limits of DNA ­profiling are being tested in California, ­following an arrest in a ­notorious serial-killer case.

The ­suspect, Lonnie David Franklin, came to the attention of police when his son ­Christopher’s genetic profile – taken when Christopher was convicted on gun charges – partially matched saliva found on the bodies of dead prostitutes.

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