Detectives search for any link between killer and his victim

Detectives are conducting detailed checks to see if killer Mark Hennessy knew his victim, Jastine Valdez, in some way or knew her movements.

Officers have said the evidence gathered to date suggested the attack was random, but investigators will “dig deeper” for any signs that the father of two did know the 24-year-old or her route home and may have targeted her.

Gardaí have said that, so far, they have not found any connection between the two people — including by examining their phone records.