The body of Alena Toennis was found in Wasilla last week

Authorities are investigating the death of a teenager whose body was found on a trail in Alaska last week.

The victim has been identified as 16-year-old Alena Toennis, of Wasilla, the Alaska Department of Public Safety said in a statement.

The investigation began on Friday, Nov. 15, when Alaska State Troopers responded to a power line trail in Wasilla regarding a deceased female.

Investigators determined, based on evidence at the scene, that her death was “suspicious” and the case was handed over to the Alaska Bureau of Investigation, per the statement.

Troopers have spoken with the person who was last seen with Alena, and interviewed “everyone who is involved,” they said.

Investigators have now categorized her death as an isolated incident while they await forensic and toxicology reports that they say “will be crucial to charging determinations.”

Alena’s family is speaking out, claiming she struggled with her mental health and addiction, according to Alaska’s News Source.

“I would say there needs to be more mental health facilities for youth that are struggling, like Alena struggled,” her aunt, Crystal Toennis, told the outlet.

She was reportedly released from a juvenile detention center in April, but her aunt believes she didn’t get the services she needed.

“I feel like the system failed her,” Crystal said, per the outlet. “The state’s very aware of the situation, and they still released her. So [we need] more resources on the state level, the federal level, to help these troubled kids.”

A GoFundMe has been set up to assist with Alena’s funeral costs; it was shared on Facebook by her family members.

“Even though she struggled later in her life, she deserves a beautiful memorial for loved ones to remember her and a final place to rest,” read part of the fundraiser.

Another GoFundMe set up for Alena said, “Alena was a bright and loving soul, full of dreams, kindness, and potential. She touched the lives of all who knew her, and her absence will be felt deeply by family, friends, and the entire community.”