‘Graham Dwyer is one of the most dangerous men this island has ever produced’ – senior gardaí on how they caught murderer

Investigators believe they stopped a ‘serial killer at kill number one’ when they got justice for Elaine O’Hara

Graham Dwyer was one of the most dangerous men this country ever produced

Maeve Sheehan

When Graham Dwyer was ­arrested and taken to Blackrock garda station over the murder of Elaine O’Hara, the then chief superintendent ­Diarmuid O’Sullivan was there to meet him.

Chiefs don’t usually greet incoming prisoners, but Mr O’Sullivan wanted to look Dwyer in the eye.