A 41-year-old man charged with the murder of a woman at Lough Erne earlier this year is understood to be her husband.
Lu Na McKinney, a 35-year-old mum-of-two from Co Donegal, was on a boating holiday to Co Fermanagh on the day she died, April 13.
Her death was at first believed to be accidental, but after reviewing the circumstances, it is understood the PSNI arrested her husband Stephen last Thursday and charged him yesterday morning on suspicion of murder.
Due at Omagh Magistrates Court today, he is also charged with possession of a Class C controlled drug.
The two charges are to be reviewed by prosecutors, in line with normal procedure.
Ms McKinney died after entering the water from a boat while she was on an Easter holiday with her husband and children, aged 13 and 11.
Emergency services found her body after her boat was moored at Lough Erne's Devenish Island. Attempts to revive her failed and she died in hospital.
With the PSNI and Gardai conducting a joint investigation into her death, an appeal has been issued to anyone who lives in Convoy, Co Donegal and had contact with Ms McKinney in the months before her death.
A spokesperson said: "I would like to appeal to any witnesses to come forward and also anyone who had contact with Lu Na McKinney, who lived in Convoy, Co Donegal, in the months preceding her death."
The PSNI can be contacted on 101 ext 40681, Crimestoppers on 0800 555 11 or the Garda at Letterkenny on 00353 749167100.