Oftentimes, law enforcement designates these individuals as voluntary missing persons, McCabe said. This month, Kobayashi was declared a voluntary missing person after Los Angeles police say she traveled to the US-Mexico border and crossed into Mexico alone. SometimesLocal law enforcement agencies across the country are responsible for investigating missing persons cases, according to McCabe. Missing persons investigations often involve forensic analysis, gathering cell phone data and requesting search warrants, he said. For every voluntary missing person who is found, there is another who is never located.

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