The 10-day long search for missing hedge fund manager Samuel Israel is entering a critical phase with law enforcement agencies sparing no expense to ensure they “get the body back” before the trail goes cold.

Authorities are now working on the assumption that the body in question will eventually be found alive and in all likelihood in a country with no extradition treaty with the US, meaning Mr Israel could be anywhere from Bahrain to Burundi, Senegal to Syria.