The man, who asked not to be named, said the family were "completely shocked and devastated" by the death.
"He [Isaac] was a good bloke, he was always out for a bit of fun. He had his good and bad parts, like everyone does but he had a good heart and he was always there for his mates if they needed him.
"We woke up to the news that he was dead and I think it will be days before it really sinks in."
Family of the dead man said Mr Bushell was originally from Kawerau. A Whakatane woman with the surname Bushell, but no relation, spoken to by the Rotorua Daily Post said she would often get phone calls and bills sent to them for Mr Bushell. She said they understood he was from Kawerau.
Another Maketu resident, Chantal Moses, said the accused and Mr Bushell were well known in the beachside town.
She said the whole town was "gutted" by what had happened.
Another local, who only wanted to be known as Jess, was drinking at the party earlier along with the two men and said she thought she had heard gunshots that morning but had shrugged it off.
"I figured it was just fireworks or something," she said.