The jury in the trial of a 50-year-old farmer accused of murdering his alleged "love rival" and putting his body in an underground tank has been sent home for the night and will resume its deliberations in the morning.

The jurors have so far been deliberating for nearly 18-and-a-half hours since last Tuesday afternoon.

Patrick Quirke, 50, of Breanshamore, Co Tipperary has pleaded not guilty to the murder of Bobby Ryan, a part-time DJ going by the name of Mr Moonlight.

Mr Ryan went missing on 3 June 2011 after leaving his girlfriend Mary Lowry's home at about 6.30am.

His body was found in an underground run-off tank on the farm owned by Ms Lowry and leased by the accused at Fawnagown in Tipperary 22 months later on 30 April 2013.

Bobby Ryan

The prosecution claims that Mr Quirke murdered Mr Ryan so he could rekindle an affair with Ms Lowry. 

The defence says the prosecution has failed to prove its case beyond a reasonable doubt and that Mr Quirke should be acquitted.

In her charge last week, Ms Justice Eileen Creedon told the jury they must not be influenced by emotion, sympathy, anger or disgust, and they must treat circumstantial evidence against the accused with care.