Ontario Provincial Police say an autopsy conducted Monday showed foul play was involved in the death of Joey Faubert, 24.
Faubert's body was found on the property of École élémentaire catholique Saint-Isidore at 20 de l'École Street late Saturday morning.
Nico Soubliere, 20, of Greely, Ont., and Cody Henry, 19, of Ottawa were charged with one count each of first-degree murder and conspiracy to commit an indictable offence.
Martin Lamoureux, 18, of St. Isidore, is currently in custody after being charged with second-degree murder and conspiracy to commit an indictable offence.
A 17-year-old was also charged with accessory after the fact.
All four appeared in court Tuesday in L'Orignal, Ont.
Two teens from North Stormont, Ont., aged 16 and 18, also face one count of conspiracy to commit an indictable offence. They are scheduled to appear in L'Orignal court on Aug. 1.
The cause of death has not been released. Police continue to investigate and ask anyone with information about the death to contact Hawkesbury OPP or CrimeStoppers at 1-800-222-8477.