Skip to main content
Press Release

Oklahoma sex offender sentenced to seven years in prison for failing to register in Montana

For Immediate Release
U.S. Attorney's Office, District of Montana

BILLINGS — An Oklahoma man convicted by a federal jury in Montana of failing to register as a sex offender after moving to the Billings area and despite repeated orders to do so was sentenced today to seven years in prison, to be followed by 15 years of supervised release, U.S. Attorney Jesse Laslovich said.

The defendant, Windelyn Valdo Shoulderblade, Jr., 33, of Broken Arrow, Oklahoma, was convicted of failure to register as a sex offender on Jan. 30, following a two-day jury trial.

U.S. District Judge Susan P. Watters presided. The court ordered the sentence to run consecutive to other cases pending in Oklahoma.

“For years, Shoulderblade refused to comply with the Sex Offender Registration and Notification Act (SORNA), while continuing to commit sex offenses and exhibiting public displays of sexual deviancy. By not registering as required by law, Shoulderblade posed a constant threat to community safety. But not anymore, as he will spend the next seven years in federal prison due to aggressive and effective work of our federal prosecutors, the U.S. Marshals Service, the Northern Cheyenne SORNA Compliance Office, and Yellowstone County Sheriff’s Office,” U.S. Attorney Laslovich said.

“Since the passage of the Adam Walsh Child Protection and Safety Act in July 2006, the U.S. Marshals Service, nationally and in Montana, has vigorously pursued those who have failed to stay compliant with the legal requirements of their registration. We will continue to do so. This sentence was the culmination of some great collaboration among several federal, tribal, state and local law enforcement entities and is a good example of how, when all of us work together, we can make our communities a safer and better place to live,” said U.S. Marshal Craig Anderson.

In court documents, the government alleged that Shoulderblade was convicted of felony sexual battery in Oklahoma in 2014 and was required by law to register as a sex offender under SORNA. The government further alleged that from about December 2022 to November 2023 in Montana, Shoulderblade knowingly failed to register and update his sex offender registration. Since his 2014 conviction, Shoulderblade continued exhibiting predacious behavior while refusing to comply with his sex offender registration requirements. While out of compliance with his registration requirements, Shoulderblade spent years committing additional sex crimes. Shoulderblade moved to Montana in December 2022 and had contacts with law enforcement in Billings and on the Northern Cheyenne Indian Reservation. Despite instructions to register by a Northern Cheyenne SORNA compliance officer and the Yellowstone County Sheriff’s Office, Shoulderblade never did. After relocating to Billings, Shoulderblade had frequent, near-weekly contact with local law enforcement between March 2023 and July 2023.

The U.S. Attorney’s Office prosecuted the case. The U.S. Marshals Service, Northern Cheyenne SORNA Compliance Office and Yellowstone County Sheriff’s Office conducted the investigation.



Clair J. Howard

Public Affairs Officer


Updated June 12, 2024

Press Release Number: 24-154