Victims have been found with no identification documents at all and in one case a stolen ID. Remote villages lack phone service to reach family members and determine the whereabouts of missing migrants. Fingerprint data has to be shared and matched by different governments.
More than a day after the discovery of 51 dead migrants in a stifling trailer in San Antonio, few identities of the victims have been made public, illustrating the challenges authorities face in tracing people who cross borders clandestinely.
