Gardaí are investigating whether the man suspected of killing Jastine Valdez went on a drink and drug binge just hours after her death.
Father of two Mark Hennesey was shot dead by Gardaí on Sunday – while the body of the 24-year-old was discovered on Monday.
Gardaí are continuing to appeal for information on the movements of Mr Hennessy over the weekend.
Meanwhile searches are continuing in Rathmichael in South Dublin this afternoon.
The scene where Jastine’s body was found remains sealed off as Gardaí look for more evidence.
Jastine’s murder and the killing of schoolgirl Ana Kriegal has prompted calls for a review of femicide in Ireland.