Victim Support chief executive Tony Paine said using real stories in the drama series was unnecessarily insensitive. "The people who work on the show must have realised the consequences on the victims' and the offender's families seeing that," he said.
"Why do they have to rely so heavily on real events - they could have made up a case every bit as stark and gritty as that.
"You would expect the producers of the show to have a bit more compassion and respect for these people," he said.
As happens in the show, the Faleali'i family were ordered out of their house by the armed offender squad. Ese Senior said he recognised himself when the series showed the offender's father going into a police cell and hitting his son, ordering him to tell the truth.
He said the family had been offered money in the past to turn their story into a movie but had declined. The show - funded with grants of $3.6 million from NZ On Air - has rated extremely well.
Faleali'i was also convicted for the attempted murder of pizza shop owner John Bell. Bell was filling a bag with cash when Faleali'i shot Marcus Doig in the back of the head. Bell said this week he had seen bits of the show and noticed similarities.
"Obviously it brings back memories but it's with me every day. I lost a good guy and staff member."
TV3 spokeswoman Megan Stuart said the show was inspired by true events but was based on a number of cases. "They did look at what was in the public domain. It drew from the experiences of Neil Grimstone who spent 27 years working in South Auckland police.
"Yes there was a shooting in a bank but that has happened lots of times around the world," she said.
Grimstone was writer and technical consultant on the show. He said the storyline of Harry was drawn from about 40 cases. Faleali'i is serving life in prison with a non-parole period of 17 years - whereas Lua died in the second episode.