The Anchorage Police Department has arrested 16-year-old Kayden McIntosh for killing 19-year-old Cynthia Hoffman, a statement from the department states.

Hoffman was reported missing by her family on Monday. Based on information from one of Hoffman's friends, her family reported to police that she had last been seen at the Polar Bear Playground at Russian Jack Springs Park on Sunday afternoon.

In a statement Wednesday morning, APD says that information was false and intended to mislead both Hoffman's family and investigators.

The preliminary investigation found that Hoffman went to Thunderbird Falls trail on Sunday with a woman friend and McIntosh.

Police say the Hoffman was bound with duct tape and an altercation took place. According to the statement, McIntosh shot Hoffman in the back of the head and pushed her into the river before fleeing with the woman.

The two then went to the Polar Bear Playground where they used Hoffman's cell phone to text family members claiming she'd been dropped off at the park. Then the woman and McIntosh went to Lions Park in Mountain View where they burned Hoffman's belongings.

Police learned of the made-up story about the park after questioning the woman and McIntosh. Officers found Hoffman's body along the riverbank near Thunderbird Falls trail.

The woman has been questioned and released. Police say McIntosh faces charges of first-degree murder and tampering with evidence.

APD says the investigation is still ongoing and more charges are possible.

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