By RICARDO ALONSO-ZALDIVAR and ELLIOT SPAGAT
WASHINGTON (AP) - Medical experts say the Trump administration's use of DNA testing to match migrant children separated from their parents is justifiable as a last resort but raises a host of ethical problems.
They include the risk of damaging the family fabric by revealing that an adult thought to be the biological parent really is not.
A federal judge in California on Tuesday said DNA testing should be limited to cases in which the parent-child relationship can't be established through documents such as birth certificates and passports.
The government has argued that DNA testing is faster than authenticating documents and protects children - especially the youngest - from being handed to someone who may not be their biological parent.
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