BRIGHTON, Colo. (CBS4)– The teenage suspect in the murder of Kiaya Campbell appeared in court on Wednesday where formal charges were filed. He remains in custody without bond.

Thornton police arrested the 15-year-old boy, later identified as Aidan Zellmer, in connection with the 10-year-old’s murder.

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The search surrounding the ravine where Kiaya’s body was found (credit: CBS)

Zellmer was charged with first-degree murder in Adams County Court.

Aidan Zellmer (credit: CBS)

“We formally filed two counts of first-degree murder. The first count is intent and after deliberation murder. The second count is what’s called murder of a child under the age of 12 by a person in a position of trust; both of those are class one felonies,” said Adams County District Attorney Dave Young.

Kiaya disappeared June 7 while walking home with Zellmer, the 15-year-old son of her father’s girlfriend. When he returned home without Kiaya, he told police they were separated in a rainstorm.

Aidan Zellmer’s father outside of court on Wednesday (credit: CBS)

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Outside the courtroom on Wednesday, Zellmer’s father shouted while holding a Bible, “God is good, God is merciful. It’s all about God… when will we return back to God.”

Kiaya Campbell (credit: CBS)

Thornton police arrested Zellmer at 11:38 p.m. Saturday for investigation of first-degree murder.

He will return to court on June 30 for a bond hearing and to set a preliminary hearing date. Prosecutors want the case transferred to adult court.

(credit: CBS)

Kiaya’s family has not publicly reacted to the tragedy but her mother did start a GoFundMe page which has raised thousands of dollars.

Kiaya Campbell (credit: CBS)

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LINK: GoFundMe To Help Support Kiaya Campbell’s Family