baby in human trafficking racket at El Salvador hospital are REUNITED with their lost son after other mothers take DNA test
Mercy Casanellas and her British-born, US-based husband Richard Cushworth have been reunited with their biological son
They have been raising another couple's child after the children were swapped after birth in El Salvador
Ms Casanellas gave birth at 35 weeks by C-section when husband was out of the country and was given anaesthetic after birth
Ms Casanellas, who is administrator for evangelical Christian mission her husband runs, was suspicious as baby seemed darker the next day
Their fears were confirmed three months later when a DNA test they ordered on baby Jacob said there was 0.000 chance he was theirs
The couple reunited with son after parents of babies born the same day at the hospital underwent DNA tests themselves
The other family had no idea they had been raising the wrong child
By MARTIN GOULD IN SAN SALVADOR, EL SALVADOR, FOR DAILYMAIL.COM and SARA MALM and MATT ROPER FOR MAILONLINE

PUBLISHED: 04:24, 8 September 2015 | UPDATED: 10:55, 8 September 2015

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The family who claimed their baby was swapped at birth and sold to traffickers in El Salvador have said they are 'absolutely thrilled' been reunited with their lost son three months after he was taken.

Brit Richard Cushworth and wife Mercedes 'Mercy' Casanellas had made a public plea for their baby's return after DNA tests showed the child they cared for since birth was not theirs.

Today, Mr Cushworth's father David told MailOnline of the family's joy, but that their thought