Crime World Extra: Is Graham Dwyer's murder conviction about to be overturned?

Ireland’s mobile phone data retention systems are under the spotlight and European legal experts have warned they may have breached the law.

Now, killer Graham Dwyer is eying up a favourable appeal to his conviction for the murder of Elaine O’Hara.

But will the jailed architect who groomed his vulnerable victim through BDSM actually walk free.

Nicola Tallant talks to barrister Ronan Lupton about the complex technicalities that could determine Dwyer’s fate.

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