The state Superior Court has denied the appeal of the Upper Macungie teen who engineered the brutal murder of her mother.

Jamie L. Silvonek, now 16, had appealed a lower court ruling denying her bid to be tried as a juvenile in the March 14, 2015, murder of her mother, Cheryl L. Silvonek, 54.

The three-judge Superior Court panel considered the 22-page Lehigh County Court ruling in arriving at its own decision.

The ruling, by Judges Anne E. Lazarus, Paula Francisco Ott and James J. Fitzgerald III, was filed Aug. 9.

The judges’ reasoned that “Despite her age, Silvonek was not amenable to rehabilitation in the juvenile system and the adult system would be better able to provide her with the help she requires.”

Silvonek’s mother opposed her then 14-year-old daughter’s sexual relationship with 20-year old Army Spc. Caleb G. Barnes.

Silvonek, the judges wrote, “was the instigator and willing participant in the murder of her mother.”

In their ruling, the judges cited numerous texts from Silvonek to Barnes on the day they killed her mother, including “She needs to go, Caleb. Right now. You don’t understand.”

They also cited trial testimony from forensic psychiatrist, John S. O’Brien.

O’Brien found Silvonek to be “a highly intelligent and manipulative young woman” who was not a “fearful or emotionally overpowered passive participant in the pre-planned, premeditated murder of her mother.”

“Silvonek, even at her young age, had become an adept liar and emotional manipulator of those around her,” he said.

The judges wrote in their ruling, “Prior to the guilty plea, Silvonek petitioned the court to have her case decertified so that she could be adjudicated in juvenile court.”

“Following a two-day hearing, the trial court denied Silvonek’s motion to transfer.

“She subsequently entered into the negotiated guilty plea mentioned above and was sentenced to 35 years’ incarceration to life as agreed,” the judges wrote.

They cited in their ruling, “Accordingly, the trial court found that Silvonek had not carried her burden to prove that a transfer to the juvenile system would serve the public interest.”

“Our comprehensive review of the certified record in this matter confirms that the trial court did not abuse its discretion in denying Silvonek’s motion to transfer to juvenile court,” the judges wrote.