The Central Criminal Court has heard that a hunting knife and a flick knife were found in the basement of Graham Dwyer’s architects firm.
The 42-year-old of Kerrymount Close, Foxrock, denies murdering childcare worker Elaine O'Hara at Killakee mountain in Dublin on August 22, 2012, more than a year before her remains were found.
Detective Sergeant Peter Woods said the hunting knife had been considered "hugely significant" by gardaí, as it had been ordered online and delivered to Graham Dwyer's workplace on the day before Elaine O’Hara went missing.
He said the black handled hunting knife was "very clean" but that the scabbard had "a number of small scratches on the leather".
Det Sgt Woods told the court he found the knives after receiving a hand drawn map from Graham Dwyer’s solicitor on February 17, 2014, several months after the 42-year-old's arrest.
The court heard one knife – a buck special – had been ordered online from activehuntingireland.ie with a request that the package be marked private and confidential.
Graham Dwyer is alleged to have been in an S&M relationship with Elaine O'Hara and to have stabbed her to death for his own sexual gratification.