The Boulder County Sheriff’s Office and Boulder County Coroner ruled on Tuesday the February death of an 18-year-old University of Colorado Boulder student was a suicide.

Megan Trussell, found near mile marker 40 of Boulder Canyon Drive in unincorporated Boulder County on Feb. 15, was reported missing to CU Boulder officials three days prior. She had been last seen on surveillance camera footage leaving her dorm on Feb. 9.

Following months of investigation, sheriff’s investigators released the results of the investigation into her death, ruling that Trussell died as the result of the toxic effects of amphetamine, with hypothermia contributing to her death. Overall, the death was ruled a suicide.

“We understand this investigation took longer than many hoped,” Boulder County Sheriff Curtis Johnson said in a news release. “This outcome is heartbreaking, and our hope is that the findings may bring some closure to Megan’s loved ones and to the broader community.”

Trussell’s family remains adamant that the death was not a suicide, though, pointing toward potential foul play surrounding circumstances of the incident.

“(Investigators) have disregarded all factors — the circumstances surrounding theft and placement of her purse, the selling of her phone, her missing shoe, the unhoused population hideout where her remains were found, and more — which do not support their initial assumptions,” Joe Trussell, Megan Trussell’s father, said on Facebook Tuesday morning.

The death took the internet by storm after the Colorado Bureau of Investigation issued a statewide Missing Indigenous Person Alert for Trussell on Feb. 13, the day after she was reported missing.

According to the sheriff’s office’s timeline, Trussell left her dorm alone at 9:36 p.m. on Feb. 9. Cell phone records showed she traveled west toward Boulder Canyon Drive, where her phone’s last signal was recorded near the 40-mile marker.

The phone stopped connecting to networks on Feb. 12 and was not found again until March 2 when it was pinged to a Boulder grocery store, according to the news release.

A homeless man, 50-year-old Elliot Michael Beafore, sold the phone and claimed he received it from another homeless person. Beafore was arrested on May 14 on suspicion of theft and false declaration to a pawnbroker. He has since been released on bond.

Trussell’s purse and missing shoe were other pieces of evidence that the family referenced as potential signs of foul play.

Vanessa Diaz, Trussell’s mother, took to social media in March, saying that one of Trussell’s shoes and her purse — referred to as her “security blanket” — were not found on her body by first responders.

A Boulder County resident found the purse near the 39.6-mile marker of Highway 36 along the bike path on March 5. An empty prescription bottle with Trussell’s name on it was found inside.

On her Facebook page, Diaz revealed that the purse was found in a tattered condition. She said that the purse was found with the side seam ripped out, a seam that Diaz had reinforced with thick, strong thread.

Investigators traced the purse back to the same area in Boulder Canyon where Trussell’s body was recovered, according to the release.

“Based on the comprehensive investigation and forensic findings from the Coroner’s Office, Sheriff’s Office, as well as a review by the District Attorney’s Office, we have found no evidence to suggest that Megan was physically harmed or killed by another person,” the sheriff’s office said in the release.

The family’s investigation into the incident will continue, though, according to Joe Trussell, who said on Facebook that the family “will release any and all additional information available as we continue the work to exonerate Megan and seek justice.”

This work will include the family’s attorney, Megan Downing, as well, according to the father.

“There are far too many unanswered questions and far too much evidence which points to a crime, regardless of what (the sheriff’s office) says,” Joe Trussell wrote in a previous Facebook post on March 19. “Every single person — friend or stranger — who has seen what we have seen knows that none of it adds up.”

The Denver Gazette reached out to Joe Trussell and Megan Downing for comment, but they did not respond by the time of this report.

Part of that fact-finding will include a private lab investigation including “comprehensive forensic testing of evidence to uncover any details missed or overlooked,” according to the family’s GoFundMe that was started to help fund the investigation and legal costs.

The GoFundMe raised over $70,000 in three months.

This story includes discussion of suicide. If you or someone you know needs help, the national suicide and crisis lifeline in the U.S. is available by calling or texting 988. There is also an online chat at 988lifeline.org.