A relative of a man who has been missing since gardai received information someone was thrown off a cliff has been approached for DNA.
Investigators are liaising with the PSNI who contacted the family member as the huge search in the Slieve League area of Donegal continues into a fourth day.
Gardai are also examining fresh information received that the missing 67-year-old had been targeted after he was seen with large amounts of cash in the Killybegs area last week.
