Marshall said outside of court the tests were done on Millerberg but could also include other people.
Deputy Weber County Attorney Christopher Shaw said prosecutors agreed the trial should be delayed in order to give Millerberg's attorneys time to sort through the new information and determine if any of it will be relevant at trial.
"I'm not happy about it," Shaw told 2nd District Judge Scott Hadley. "But I don't see any other way to handle it. Mr. Millerberg deserves a fair trial."
Jury selection for Millerberg's trial was set to begin on July 23. Instead, Hadley set a new trial date for Feb. 10.
Millerberg also is charged with felony counts of obstructing justice, desecrating a body and having unlawful sexual activity with a minor.
Millerberg's wife, Dea Millerberg, 39, is charged with desecration of a human body related to the girl's death.
Her case has been trailing her husband's, and no trial date has been set.
Dea Millerberg testified last April at her husband's preliminary hearing that he injected a fatal mix of heroin and methamphetamine into the teen and that the couple, in a panic, then dumped the girl's body in a remote part of Morgan County.