The mother-of-two who died after suffering suspected knife wounds at her home in Co Donegal left poignant messages on a social media website where she described herself as "someone who was put on Earth to help others".
Aspiring actress and model Jasmine McMonagle (28) was found dead at a house in Killygordon early last Friday morning.
A man in his 20s was arrested about 7.30am and taken to Letterkenny Garda Station.
Jasmine's two daughters, aged seven and one, were taken to be cared for by family members.
Close friends of the young mother have told how she lived for her children.
Just days before she died in such tragic circumstances, Jasmine was seen walking hand-in-hand down the estate with her eldest girl, who is aged seven. The doting mum walked the little girl to the nearby Dromore National School each morning.
Neighbour Damian Scanlon said that although he did not know the tragic young mother personally, he recalls how she waved to him that day.
"I do remember her waving to me over Christmas and she was walking with her daughter. She seemed lovely and it was [the waving] all just a very normal thing to happen. But this is a very normal estate.
"Kids play out on their go-karts and bikes all the time but for something like this to happen is just so awful."
Neighbours estimated that Ms McMonagle had lived in the estate for up to five years but was originally from the border village of Castlefinn about 15km away.
A close friend of Ms McMonagle said she was "quiet but driven".
"She just always wanted to be a model and an actress. To think now that Jasmine is gone and that two those little girls are never going to see her again is just too much to even think about - it's beyond heartbreaking."