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Nearly five years on from his diagnosis, Mr Tottoh is now determined to make memories with his family and his grandson Theo, nine.

Immigration agents were recently seen making arrests outside her grandson’s Los Angeles school, she said.

Mrs McKay's grandson, Mark Dyer, told the BBC the family was inspired by the Mel Gibson movie Ransom to make a last-ditch attempt to solve the mystery.

The city leader also said she was aware of at least "five raids by ICE throughout the region" on Monday, including one near her grandson's school.

A couple accused of murdering their grandson were called "child beaters" by their son, a court has heard.