The Garda is investigating reports that the killer of a young woman in the Republic went on a cocaine and drink binge just hours after he murdered the student.
Officers were contacted by a south Dublin drug dealer who informed them that Wicklow man Mark Hennessy (40) contacted him looking for drugs on Saturday night.
The criminal has told investigators that he had no drugs to give him.
The call was allegedly made hours after Hennessy abducted Jastine Valdez (24) as she walked to her home in Enniskerry, Co Wicklow, on Saturday evening.
It has also emerged that Hennessy, from Bray, had been drinking "massive" amounts of alcohol in the weeks leading up to the brutal attack on Filipina Ms Valdez, and feared that his wife was going to leave him and return to her native Wales with their two children.
Post-mortem results have confirmed that Ms Valdez was the victim of manual strangulation.
Gardai are still searching for a rucksack and iPad belonging to the student.
Officers were alerted to the shocking discovery of Ms Valdez's body when they found a heavily blood-stained note in Hennessy's Nissan SUV after he was shot dead by a detective in south Dublin's Cherrywood Business Park on Sunday evening.
In the note, detectives were able to decipher the words 'Puck's Castle', and Hennessy also apologised for his sickening crime. The chilling note resulted in the body of a female being found in dense gorse near Puck's Castle Lane in Rathmichael, south Dublin, on Monday afternoon.
It can be revealed that after the brutal murder Hennessy went to a pub in his native Ballybrack and spent the evening drinking, and also attempted to get cocaine.
Investigating officers have gathered CCTV footage of him in the pub.
"It is highly unusual for a drug dealer to come forward like this to say someone was looking for drugs but then again this is a highly unusual case," a source said last night.
"This shows how disgusted people, even criminals in the wider community, feel about this vile murder."
Officers are now investigating whether the father-of-two is linked to any other murders or rapes after the apparently random abduction and brutal strangulation of Ms Valdez.