Muller is representing himself on six new felony counts, kidnapping for ransom, two counts of forcible rape, robbery, burglary and false imprisonment in connection with the 2015 Vallejo kidnapping.
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TIMELINE: Denise Huskins, Matthew Muller Vallejo kidnapping case
Monday, Solano County Superior Court Commissioner Robert Q. Warshawsky granted Muller's intention to represent himself.
The Solano County District Attorney's Office filed the state charges against him on Jan. 26.
When Huskins and her fiancée Aaron Quinn take the stand during next week's preliminary hearing, Muller will cross examine them.
Solano County Chief Deputy District Attorney Sharon Henry told ABC7 News, "We are preparing as if the victims will be testifying."
RELATED: Couple at center of kidnapping Vallejo police called hoax break their silence
Proposition 115 protects victims like Huskins and Quinn from being re-victimized by allowing what's called hearsay testimony by law enforcement officials at preliminary hearings.
Henry says subpoenas have been issued for law enforcement officials, however Huskins' attorney Doug Rappaport tells ABC7 News he has concerns.
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"If the District Attorney is subpoenaing or asking Denise and Aaron to be there as well what that tells me is the district attorney isn't so sure that law enforcement is going to show up and or do a good job .. So let's hope this isn't another time where law enforcement the Vallejo Police Department the FBI let Denise and Aaron down," said Rappaport.
Vallejo Police initially called the couple liars and said they made the whole thing up.
Because Muller is representing himself and has a right to review all the evidence in the case, he will also be allowed to view the videotapes he made of Huskins' alleged two rapes.
EXCLUSIVE: Woman in Vallejo kidnapping case recounts her 'nightmare'
"Disgusting that he could watch a videotape of his own crime but at the same time we have something called the constitution which allows him to do it," said Rappaport.
On Monday, Muller pleaded not guilty to the new charges in Solano County Superior Court, but said he'd be willing to plead guilty if Huskins and Quinn donated half their $2.5 million settlement against the Vallejo Police Department to the innocence project, a group that works to exonerate those who have been wrongly convicted.
"There will be no pleas in this case for what he is offering. That is in my opinion absurd," said Henry.
"He's asking for a ransom yet again, and quite frankly they didn't pay it the first time and they're not going to pay it the second time," said Rappaport.
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RELATED: Vallejo reaches tentative $2.5 million settlement in Denise Huskins kidnapping case
Muller is already serving a 40-year federal prison sentence for the kidnapping of Huskins.
He was sentenced in federal court last year as part of a plea deal in which he entered a guilty plea to kidnapping in exchange for federal prosecutors not seeking a life sentence.
Muller is being held under $2.25 million in Solano County Jail, according to the district attorney's office.
The nationally publicized saga involving Denise Huskins and her boyfriend Aaron Quinn included a defamation of character lawsuit they filed against the Vallejo Police Department after police said the kidnapping was a hoax. Police later apologized to the couple.
Prosecutors said Muller drove Huskins in the trunk of his car on March 23, 2015, held her hostage for two days and made ransom demands totaling $15,000. Huskins was released near her family's home in Huntington Beach on March 25.
Muller was arrested in South Lake Tahoe on June 8, 2015, after evidence, including a video of Muller and Huskins, was found at his mother's home.
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