Three investigations are under way after a man accused of murdering his wife and hiding her body in a wardrobe died in Mountjoy prison.
Mr Lee was unresponsive when prison officers went into his cell at 8am this morning.
He was pronounced dead shortly before 9am after taking his own life.
There are now three investigations under way into the circumstances of his death: a garda investigation; an internal prison examination of the circumstances and an inquiry by the Office of the Inspector of Prisons.
Keith Lee's marriage broke up last year when his wife found out he was having an affair.
He became heavily involved in drugs and was caught dealing in a Dublin nightclub.
Mr Lee was arrested and questioned about the drugs by gardaí and a file had been sent to the Director of Public Prosecutions.
The 42-year-old man told gardaí that in the days running up to the murder, the couple was trying to reconcile but, in a cocaine-fuelled binge, Mr Lee murdered Joanne and hid her body in a wardrobe.
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Joanne Lee had been reported missing on 13 February.
Gardaí made a missing persons appeal on St Valentine's Day and her car was spotted outside a house on Ranelagh Road.
Gardai forced their way into a flat in the building where they found Ms Lee’s body wrapped in a sleeping bag in a wardrobe.
Mr Lee jumped out of the third floor window, breaking his two legs.
He attempted to kill himself but a garda intervened and stemmed the blood using his own shirt.
After a month receiving treatment in hospital Mr Lee was arrested, charged and remanded in custody, initially to Cloverhill Prison before being transferred to Mountjoy Prison at the end of March.