Dozens gathered at Vaiola Hospital in the morning including Mark Santos from the New Zealand High Commission’s office in Nuku’alofa to farewell the deceased.
Mr Cook, 67, died on Sunday after being allegedly assaulted on Friday night on the outskirts of Nuku’alofa.
According to a Kaniva News report, Police said the accused, who was arrested on Sunday, remains in custody.
The Ma’ufanga teen has not been named and is due to appear in court on Monday.
Mr Cook ran the Salvation Army’s alcohol and drug awareness centre.