Evidence against murderer Graham Dwyer 'overwhelming', State tells appeal

Dwyer had earlier repeatedly interrupted the prosecution to deny text messages attributed to him

On one occasion Graham Dwyer (pictured) interrupted Mr Guerin by simply saying "no" when counsel was speaking about text messages. File picture

There is still "overwhelming" evidence against Graham Dwyer to preserve his conviction for the murder of Elaine O'Hara and the State was not dependent on mobile phone call data used in his trial, a senior counsel told the Court of Appeal on Friday.

Dwyer (50), who murdered the vulnerable care worker for his sexual gratification in 2012, is appealing his conviction. His lawyers are arguing that the retention of mobile phone data used in the case is an "opportunistic form of mass surveillance" that transforms phones into tracking devices that can reveal a detailed picture of every aspect of a person's life.