Jadianna Larsen Case: Juan Rivera and His Mother Appear in Court

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Juan Rivera, 25, the man accused of murdering 6-year-old South Sacramento girl, Jadianna Larsen, appeared in Sacramento County Court for his arraignment Tuesday afternoon.

His mother, Lisa Burton, also appeared in cuffs, accused of being an accessory after the fact of a homicide.

"The allegation is that the defendant Juan Rivera murdered 6-year-old Jadianna and that his mother, Lisa Burton, assisted in the covering up of that crime," Rod Norgaard, with the Sacramento County DA's Office, said.

Cameras were allowed into the courtroom, however, the public defender asked the judge not to allow the media to shoot the defendants' faces, pending review of the discovery.

Rivera came into the courtroom, looking down and shaking his head, as Judge Jaime Roman read his charge: one count of felony murder with a blunt force instrument.

Rivera's original story to investigators was that he suffered a seizure last Thursday, and did not realize his girlfriend's daughter Jadianna was missing until his mother came to check on him at his residence on 47th Avenue.

Right after Rivera's arraignment, his mother, Lisa Burton, arrived in the same courtroom. She stood quietly, as she faced her fate.

"The mother is charged with being an accessory after the fact to a homicide," Norgaard said.

Fox 40 spoke to the Glenn County undersheriff, Todd James, who said they have handed over the physical evidence to the Sacramento District Attorney's Office.

They are now focusing on finding the cause of death through toxicology results, which may take up to four weeks to determine.

"There is still some forensic pathology being conducted in Chico State identification human laboratory," Norgaard said.

We noticed Jadianna's grandfather standing outside the courtroom right after the arraignments. He was not available for comment.

The two will appear at their next court appearance on June 12 at 8:30 a.m.