A 25-year-old man charged with first-degree murder and two counts of attempted murder appeared in court in Pembroke, Ont., on Tuesday.
Brian David Goddard was shackled and had bandages on his left hand and forearm when he walked into the courtroom.
The June 28 incident in Petawawa left one man dead and a woman and teenage girl critically injured.
Police received a 911 call just before 11 a.m. ET for an incident at a home on East Street at Petawawa Point, which is near the shore of the Ottawa River.
Officers found a man dead, as well as a 55 year-old woman and 17 year-old teenage girl with critical injuries. Paramedics transported the victims to hospital.
Goddard was arrested after a search of Petawawa and was assessed by paramedics after being taken into custody. Police said he has no connection to CFB Petawawa.
Friends and neighbours of the victims were in court Tuesday.