Sean Joseph Brennan, a 58-year-old resident of Hudson, Wyoming, has been sentenced to 120 months in federal prison followed by ten years of supervised release for possession of child pornography. This was a subsequent offense. The court ordered him to pay $33,000 in restitution to the victims identified in the child pornography he possessed. The investigation began on September 10, 2024, when the Lander Police Department contacted the Wyoming Division of Criminal Investigation’s Internet Crimes Against Children task force for assistance. They discovered that Brennan had engaged in online chats with someone he believed to be 13 years old. Search warrants led to the seizure of electronic devices containing thousands of images and videos classified as child sexual assault material. Assistant U.S. Attorney Z. Seth Griswold prosecuted the case, and U.S. District Court Judge Alan B. Johnson imposed the sentence on June 25 in Cheyenne.
In another case, Tyler Kihlstrom from Gillette, Wyoming, was sentenced to 168 months in federal prison with five years of supervised release for conspiring to distribute methamphetamine. Between March and May 29, 2024, Kihlstrom conspired with others to obtain methamphetamine from Colorado for distribution in Wyoming. He was arrested near Douglas after several controlled purchases were made by agents and was found possessing 549 grams of methamphetamine and over $8,000 in cash. Assistant U.S. Attorney Cameron J. Cook prosecuted this case as well, with Chief U.S. District Court Judge Kelly H. Rankin imposing the sentence on June 26 in Cheyenne.
Jorge Perez-Romero, a Mexican national aged 51, was sentenced to time served and will be deported for illegal reentry into the United States after being previously removed without applying for reentry permission following his formal removal in June 2005. His arrest occurred on April 6, 2025, due to traffic-related offenses by the Wyoming Highway Patrol; Immigration and Customs Enforcement then became involved upon learning his immigration status.
The United States Attorney’s Office represents the federal government in litigation within the District of Wyoming and handles criminal prosecutions for federal law violations alongside civil lawsuits involving or against the government.
