A post-mortem examination has confirmed that 24-year-old Jastine Valdez died by strangulation.
It is understood that the student was killed within 45 minutes of being abducted.
Jastine was last seen being forced into a car shortly after 6 pm on the R760 south of Enniskerry. The car involved in this incident was described to Gardaí as a dark coloured Nissan SUV.
A vigil for #JastineValdez is being organised for this evening in her home village of Enniskerry in Co Wicklow. Locals have been laying flowers at the scene. pic.twitter.com/IphRBNtcgZ
— Today FM News (@TodayFMNews) May 22, 2018
Gardaí have since renewed their public appeal.
They said: “We are particularly interested in the movement a black Nissan Qashqai, registered number 171 D 20419, and the driver of this vehicle Mark Hennessy, between 5 pm on Saturday 19th May and 8 pm on Sunday 21st.”
They would particularly like to speak with people who were in the; Dalkey, Killiney, Ballybrack, Sallynoggin, Cherrywood, Rathmichael areas.
A book of condolence for Jastine Valdez has been opened at the Powerscourt Arms Hotel in Enniskerry. pic.twitter.com/CJa60IpZyq
— Sinéad Hussey (@SineadHus) May 22, 2018
The car may have stopped at restaurants, cafes, petrol station shops or bars in those areas.
If you travelled in this part of County Dublin between Saturday and Sunday evenings and you have a dash cam fitted please contact us and make the footage available to investigators.
Anyone with information should contact Bray Garda Station on 01-6665300 the Garda Confidential Line 1800 666 111 or any Garda Station.
