The trial had been set for Sept. 16, but was taken off that day's docket. A new date has not been set.
Attorneys for Turner said boxes of new information including video discs had been discovered. So far, they said, the material they found was related to other people in the case and had somehow been missed.
A defense attorney said the prosecutor's office told him it was a mistake.
Prosecutor Paul Hagerman says his office discovered the information in the last two weeks.
"The state is under a continual obligation if they get information in the case to turn it over to defense attorneys, and that's what we did," he said.
"I take Paul at his word that it was an oversight that it wasn't turned over," defense attorney John Perry said.
Sherra Wright was sentenced in July to 30 years in prison for facilitating the murder of her ex-husband Lorenzen Wright. Turner still faces charges in the case.