And Maori had to put a stop to violence among themselves, she said.
"We are destroying one another," Ms Simeon said. "It has to stop. There has to be teaching within our whanau.
"When our children grow up, they take their own path, but we have to love them and support them. We are here to show that we care about one another."
Mr Moore, she said, had high principles and morals. Some people had seen only a gangster but she had seen the better side of him, a man who, for instance, was strongly opposed to violence against women.
Mr Moore, 48, was a member of the Tribesmen.
Hone Bassett, who led the brief service, said suffering and shame had been brought upon the whanau.
"Closure must be what we all look for now," he said.
He thanked the police for finding Mr Moore and those who had taken him back to Taupo Bay, where he belonged.
"There is no way our bro would have wanted to be here for the rest of his eternal life," he said.
"I don't know how Christian he was, or if he was Christian at all. The things he did suggest he was not that way inclined, but he deserves our karakia.
"Be strong, whanau, for the next few days, the next few weeks. There is no need now to come back to this place."
Mr Moore was last seen in the company of a fellow gang member on March 31. Police said the focus was now on bringing the person or persons responsible for Mr Moore's death to justice.