Wasilla man receives 30-year sentence for distribution of carfentanil, resulting in one fatal and one non-fatal overdose

A Wasilla man was sentenced on January 22 to 30 years in prison and will serve the rest of his life on court mandated supervision following release from federal custody for distributing carfentanil to two people, resulting in the near fatal overdose of an adult victim and the fatal overdose of a minor victim.

Sean Mobley, 45, from Wasilla, was sentenced after pleading guilty last October to federal charges including distributing carfentanil to two people, resulting in the fatal overdose of a minor victim and the near fatal overdose of an adult victim. He also pleaded guilty to a felon in possession of firearms charge filed through a separate federal indictment in July.

In a press release from the Department of Justice, United States Attorney’s Office District of Alaska, in November, 2024, Mobley agreed to supply an individual with fentanyl powder to distribute to a third party. Mobley and the intermediary drove to a residence in Wasilla, where the intermediary sold the powder to an adult victim for $100. According to court documents, shortly after the sale, the adult victim used the substance and overdosed. The adult victim was revived by Naloxone.

Law enforcement later determined that the powdered substance that Mobley believed was fentanyl was, in fact, carfentanil. Carfentanil is an opioid used by veterinarians and is 100 times more potent than fentanyl.

After distributing carfentanil to the adult victim, Mobley drove to a local gas station, dropped the individual off, and picked up the 16-year-old victim, later identified as Alena Toennis.

Mobley took the minor victim to an isolated location intending to use drugs together, providing some of the substance containing carfentanil to the minor victim. The minor victim used the substance, overdosed and died within minutes. Mobley dumped her body in a remote area and fled.

Following the overdoses, Mobley was found with a shotgun. On Jan. 28, 2025. At that time, Mobley had three prior felony convictions, prohibiting him from possessing the weapon under federal law.

On June 10, a federal grand jury returned an indictment charging Mobley with distribution resulting in death and serious bodily injury. On July 17, a federal grand jury returned a separate indictment charging Mobley with being a felon in possession of a firearm and being an unlawful drug user and addict in possession of a firearm. On Oct. 9, Mobley pleaded guilty to two counts of distribution resulting in death or bodily injury, and one count of possessing a firearm as a felon.

During sentencing, the Court stipulated that Mobley will serve 30 years in prison for the distribution charges, and will serve 2 years in prison concurrently for the firearm charge.

“Mr. Mobley acted callously and without remorse. He peddled whatever he could get his hands on to make a quick buck, including deadly drugs, with zero regard for human life,” said U.S. Attorney Michael J. Heyman for the District of Alaska. “Let this be a warning—whether you lead an international drug trafficking organization or are a street-level dealer—if you endanger Alaskans, the consequences will be severe.”

“Mr. Mobley showed complete disregard for human life when he provided the deadly dose of carfentanil to the 16-year-old victim,” said Robert A. Saccone, Special Agent in Charge, DEA Seattle Field Division. “Not only did the teenage girl overdose in his vehicle, but instead of trying to get help, he disposed of her body in a remote area and fled. DEA was proud to work with our partners at the Alaska State Troopers and the U.S. Attorney’s Office for the District of Alaska to seek justice for the young victim in this case. Mr. Mobley will spend the next 30 years paying for his complete disregard for human life. Let this sentence also send a message to other drug traffickers: you will be held accountable for peddling this poison.”

“This significant sentence reflects the danger and seriousness of distributing illicit drugs like carfentanil,” said Alaska State Troopers Colonel Maurice Hughes. “These drugs upend lives and devastate communities across our great state. Your Alaska State Troopers will continue to hold offenders accountable and keep dangerous narcotics out of Alaska.”

When Mobley agreed to the guilty plea, Toennis’s family had mixed emotions. “It’s hard to explain it wasn’t relief or happiness, it brought up a lot of emotions,” says Elyssa Toennis, sister to Alena, about the guilty plea and the aftermath of their loss and subsequent case working through the state and federal systems. “It felt like a wave of sadness, hurt, and anger coming to terms with it isn’t going to be easy. It was very hard to hear but, I’m grateful for everything to be moving forward.”

The DEA Anchorage District Office and the Alaska State Troopers investigated the case. Assistant U.S. Attorneys Tom Bradley and Alana Weber are prosecuting the case, with assistance and collaboration from the State of Alaska Department of Law, Office of Special Prosecutions.