Gardaí are searching for an iPhone belonging to 18-year-old Cameron Reilly who was found dead in Co Louth at the weekend.
The young man's body was found on Saturday, in a field just outside the town of Dunleer.
A post-mortem confirmed he had died in 'violent circumstances', prompting gardaí to launch a murder investigation.
Gardaí also want to speak to anyone with information about his movements on Friday evening or Saturday morning.
Speaking at Drogheda Garda Station, Inspector John O’Flaherty explained: "We are particularly appealing for assistance from the public to locate Cameron’s phone, an Apple iPhone 8X (64GB) with a green hard back cover, space grey in colour.
"We would ask home & business owners in Dunleer to check their property including wheelie bins and waste skips. We would also ask anyone offered a phone for sale as described to contact us."
Any drivers with dashcam footage from the area are also been asked to come forward.
Witnesses or anyone with information can contact Drogheda Garda Station on 041-987-4200, the Garda Confidential Line at 1800-666-111, or any Garda station.