At least here, most were just calling random telephone and letting people guess who is the kidnaped person
> Bububu. Hi, I'm ... bububu
> John?
> Bububu. Yes, I'm John. bububu. I'm in bububu ... the jail in ... bububu
> Mexico?
> Bububu. Yes, In Mexico. bububu. And I need money ... bububu
There are other that research the victim and have more data for a targeted call, but it's more difficult so most cases where random calls where they don't have a sample voice of the victim.
> Bububu. Hi, I'm ... bububu
> John?
> Bububu. Yes, I'm John. bububu. I'm in bububu ... the jail in ... bububu
> Mexico?
> Bububu. Yes, In Mexico. bububu. And I need money ... bububu
There are other that research the victim and have more data for a targeted call, but it's more difficult so most cases where random calls where they don't have a sample voice of the victim.