Cormac O’Keeffe catalogues the painstaking policing and investigative work, as well as the chance discoveries, that contributed to the conviction of Graham Dwyer for the murder of Elaine O’Hara. (This article was originally published in March 2015)

Bondage cuffs, chains, knives, a leather mask, rope, a ball gag, a blindfold, and the keys to Elaine O’Hara’s home were found in a lake.