Det Garda Nevin said she examined a forensic copy of the hard drive of Elaine O’Hara’s Apple laptop in September 2013.
She said she used special software to look at the computer’s calendar entries and identified one of interest from June 30, 2011.
The jury was then shown screen shots of the entry as Ms O’Hara would have seen it on her screen.
It read: “Graham’s phone number 083 1103474.”
The jury had also heard evidence from a clinical nurse manager from St Edmundsbury Hospital in Lucan about his dealings with Ms O’Hara.
Damien Lanigan agreed that, years ago, Ms O’Hara had mentioned soliciting someone to harm and possibly kill her.
He was also aware she previously had an interest in the ‘S&M’ lifestyle and had met other parties to engage in sexual practices.
He said he saw no evidence of self-harm during her 2012 stay in hospital and that her father used to visit her there.
Under cross-examination by the defence, he confirmed he was aware Ms O’Hara had taken part in strange sexual practices with strangers. He was aware she had arranged to meet these people over the internet.
The trial has heard Ms O’Hara was last seen in Shanganagh, South Dublin, on August 22.
Her skeletal remains were discovered at Killakee on September 13, 2013.
A cause of death could not be determined.
The trial continues today before Mr Justice Tony Hunt. The jury is excused until Monday.