Gardai are investigating the death of a 24-year-old father of three at his home in Laghey this morning (Fri).
He was found dead on a couch at his home.
The man was named locally as Conor Goodway who was due in Donegal District Court next Monday for sentencing.
He pleaded guilty along with another man in November to the theft of €5,000 of legal highs from a head-shop in Donegal town.
Judge Kevin Kilrane refused to compensate the shop owner for the theft but adjourned sentencing for six months while the behaviour of Mr Goodway and the other man was monitored.