Sex Offender Living Near School Sentenced for Failing to Register as a Sex Offender

TULSA, Okla. - A sex offender living near a school in Tulsa was sentenced today for failing to register as a sex offender, announced U.S. Attorney Clint Johnson.

U.S. District Judge Sara E. Hill sentenced Mark Joseph Vossler, 53, to 27 months imprisonment, followed by five years of supervised release. Upon his release, he will also be required to register as a sex offender.

According to court documents, in 1994, Vossler was convicted of sexual battery after he forced a 19-year-old woman to have sex with him while he held the victim down. After pleading guilty, Vossler was sentenced to a five-year deferred sentence and ordered to complete 80 hours of community service. After violating the conditions of probation, Vossler was ordered to serve five years in the Department of Corrections.

In a second sexual assault incident in 2013, Vossler grabbed the victim by the hair while he was driving. He told the victim he had a gun, was a member of the Universal Aryan Brotherhood, and said that he would blow the victim's head off if she did not have sex with him. Vossler pulled the vehicle over and sexually assaulted the victim. He pled guilty to sexual battery in 2015, was ordered to serve five years, and was required to register as a sex offender.

Court records show that Vossler was previously convicted in 2006, 2016, 2020, and 2023 for failing to register as a sex offender. He was federally indicted in August 2025 for failing to register as a sex offender from March through July 2025. Records obtained by the U.S. Marshals show that Vossler was using the Supplemental Nutrition Assistance Program and reported that he was homeless. However, after further investigation, marshals located Vossler living in a prohibited apartment in Tulsa near a school.

Vossler will remain in custody pending transfer to the U.S. Bureau of Prisons.

The U.S. Marshals Service investigated the case. Assistant U.S. Attorney Michele Hulgaard prosecuted the case.