O’Rourke, 35, died of gunshot injuries he sustained after police were called to a Coromandel Court address in Palmerston North on the evening of January 20.
Emergency services were called to a Coromandel Court address at about 7.30pm following reports a man had been shot, Detective Senior Sergeant Mike Deegan earlier said.
He was taken to hospital but later died from his injuries.
The 19-year-old from Ruakākā, who has interim name suppression, was remanded in custody on Wednesday.
He will appear in the High Court at Palmerston North on April 12.
Police earlier appealed for any dashcam or CCTV footage from the evening of Saturday, January 20 from anyone in the Coromandel Court and Featherston St.