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Claudia and Maria Isabel de Wallace

Mexico has one of the highest kidnap rates of anywhere in the world.

Gangs linked to organised crime and the drug trade used to be the main perpetrators - but now kidnapping is so endemic that all kinds of criminals are involved.

People are often held for very small amounts of money.

For families who have had relatives kidnapped, the effects can be devastating.

Maria Isabel de Wallace's son, Hugo, was kidnapped in 2006. She now knows that he was killed and beheaded soon after he was abducted.

Maria and her daughter, Claudia now work together to provide unofficial support and advice to families whose loved ones have been taken.

As well as seeking justice, Maria has another reason for hunting for the kidnappers.

Her son's body has never been recovered.

Claudia explained to Outlook's George Arney that they want to be able to lay Hugo to rest at last.