Murder of Elaine O'Hara

'''Elaine O'Hara''' (17 March 1976 – ) was an Irish childcare worker who was murdered in August 2012 by architect Graham Dwyer. She was last seen alive at a public park in Shanganagh, Dublin, Ireland, on 22 August. The remains of her body were discovered on Killakee Mountain, south of Dublin, in September 2013. The investigation of her disappearance and later of her death was widely reported.

The 2015 trial and conviction of Dwyer led to the circulation of evidence concerning O'Hara's and Dwyer's involvement in the BDSM sexual subculture. The evidence of Dwyer's sadistic sexual practices led to the murder being called one of the most shocking crimes in Irish history.

A subsequent appeal by Dwyer, which questioned the legal basis for retaining the mobile phone metadata (which was used in the prosecution case against him), was upheld by the Court of Justice of the European Union (CJEU). The outcome of this decision was described as having potentially "serious implications for the investigation of serious crime across Europe", and provided a basis for further appeal by Dwyer. Dwyer lost several appeals, in both the Court of Appeal and subsequently the Supreme Court, with the latter unanimously ruling that the evidence derived from mobile phone data was admissible at his original trial. Provided by Wikipedia