Activity in the U.S. Attorney's Office

Drug Trafficking

Shaleen Ungricht, 47, from Rock Springs, Wyoming, was sentenced to 140 months’ imprisonment with four years of supervised release to follow for distribution of methamphetamine. According to court documents, the Wyoming Division of Criminal Investigation (DCI) identified Ungricht as a multi-pound distributor of methamphetamine in Southwest Wyoming. Beginning in March 2024, agents made six controlled buys from the defendant, totaling 614.6 grams. At the time of her arrest in January 2025, agents found 44.3 grams on her person and another 241.6 grams in her residence. Wyoming DCI and the Drug Enforcement Administration investigated the crime. Assistant U.S. Attorney Z. Seth Griswold prosecuted the case. Ungricht was indicted on May 21 and pleaded guilty on July 29. U.S. District Court Judge Scott W. Skavdahl imposed the sentence on Nov. 19 in Cheyenne. Case No. 25-CR-00083

Stalking

Jose Bradley Isaacson, 22, of Smithfield, Utah, was sentenced to 36 months’ imprisonment with three years of supervised release for interstate stalking. According to court documents, the victim had recently ended a relationship with the defendant. The victim was working in Yellowstone National Park when the incident occurred. The defendant made numerous attempts to contact the victim and made threats against her. On June 21, he drove to Old Faithful Village in Yellowstone to confront the victim. He physically grabbed her in an effort to get her to go with him. When she refused to leave with him, he ran from the area. The victim reported the incident to Park Rangers, who found his car and impounded it. The next day, the defendant stole a rental car and fled towards Grand Teton National Park. Rangers used a tire deflation device to stop the vehicle, and the defendant fled on foot. He was captured a short time later by Grand Teton Park Rangers. National Park Rangers investigated the crime and Assistant U.S. Attorney Kerry Jacobson prosecuted the case. Issacson was arrested on June 22 and pleaded guilty on Sept 2. U.S. District Court Judge Alan B. Johnson imposed the sentence on Nov. 21 in Cheyenne. Case No. 25-CR-00122

Drug and Firearm Offenses

Corey Thacker, 37, with no permanent residence, was sentenced to 70 months’ imprisonment with three years of supervised release to follow for possession with intent to distribute methamphetamine and use of a firearm in relation to a drug trafficking crime. According to court documents, on February 3, 2025, Cheyenne Police Department detectives conducted a traffic stop on the defendant and found approximately 31.52 grams of suspected fentanyl pills and 13.47 grams of suspected methamphetamine inside his backpack. Detectives also found a digital scale, plastic packaging materials, and $2,200.00. Officers discovered a Ruger .380 semi-automatic handgun on the defendant’s hip holster to which he acknowledged needing for protection as a drug dealer. The Cheyenne Police Department and the Drug Enforcement Administration investigated the crime. Assistant U.S. Attorney Paige Hammer prosecuted the case. Thacker was arrested on March 6 and pleaded guilty on July 15. Chief U.S. District Court Judge Kelly H. Rankin imposed the sentence on Nov. 7 in Cheyenne. Case No. 25-CR-00099

Illegal Re-Entry of a Previously Deported Alien

Mario Cisneros-Tenorio, 40, of Serrano, Guanajuato, Mexico was sentenced to time served - plus up to ten (10) days to allow for deportation proceedings - for illegal reentry into the U.S. after previously being deported. According to court documents, on Aug. 24, the defendant was encountered at the Sweetwater County jail after being arrested for driving under the influence of alcohol and other driving related offenses. The defendant initially provided the officer a Mexico driver’s license. Agents with Immigration and Customs Enforcement (ICE) determined that Cisneros-Tenorio had not applied for permission to reenter the U.S. after being formally removed in April 2016. ICE investigated the crime, and Assistant U.S. Attorney Timothy W. Gist prosecuted the case. Chief U.S. District Court Judge Kelly H. Rankin imposed the sentence on Nov. 24 in Cheyenne. Case No. 25-CR-00126

About the United States Attorney's Office

The United States Attorney’s Office is responsible for representing the federal government in virtually all litigation involving the United States in the District of Wyoming, including all criminal prosecutions for violations of federal law, civil lawsuits brought by or against the government, and actions to collect judgments and restitution on behalf of victims and taxpayers. The Office is involved in several programs designed to make our communities safer. They include:

Project Safe Childhood
Project Safe Childhood (PSC) is a DOJ initiative that combats the proliferation of technology-facilitated sexual exploitation crimes against children. The threat of sexual predators soliciting children for sexual contact is well-known and serious.

Operation Take Back America
Operation Take Back America is a nationwide initiative that marshals the full resources of the Department of Justice to repel the invasion of illegal immigration, achieve the total elimination of cartels and transnational criminal organizations (TCOs), and protect our communities from the perpetrators of violent crime. It also streamlines efforts and resources from the Department’s Organized Crime Drug Enforcement Task Forces (OCDETFs) and Project Safe Neighborhood (PSN).

Victim Witness Program
The Victim Witness Coordinator for the United States Attorney’s Office for the District of Wyoming is dedicated to ensuring victims of federal crimes and their family members are treated with compassion, fairness, and respect.

To report a federal crime, go to: https://www.justice.gov/actioncenter/report-crime