The Central Criminal Court has heard there is six months of CCTV footage in the case of murder accused Graham Dwyer.
Mr Dwyer, a Dublin architect, is charged with murdering childcare worker Elaine O'Hara, 37, in Co Dublin on 22 August 2012.
Ronan Kennedy BL, defending, made an application today for a second junior counsel to be assigned to the case.
The court was told that the defence had one senior and one junior counsel assigned to the case.
Mr Dwyer, of Kerrymount Close in Foxrock, was present in court for the hearing.
The 41-year-old is in custody awaiting trial, which is scheduled to begin on 19 January next year and is expected to last six weeks.
Mr Kennedy informed Mr Justice Paul Carney that there were 540 witness statements and 408 witnesses in the case.
The barrister said the book of evidence comprises seven volumes.
He told the court there were 925 exhibits and five terabytes of data in computer evidence.
Mr Justice Carney said he would make the order for a second junior counsel for the defence.
"There is a very significant amount of work to be done which justifies another junior," said the judge.