PIERRE — South Dakota Attorney General Marty Jackley announced that a Sisseton man has been convicted and sentenced to a combined 25 years in prison after earlier pleading guilty to three counts of sexual assault with a child under age 16.

Irvin Hill Sr., 71, was sentenced Nov. 13 in Roberts County Circuit Court. Hill Sr. was sentenced to 15 years in prison for on the first count of sexual contact. He also was sentenced to prison for an additional 15 years, with five years suspended, on the other two counts.

Prosecutors said the assaults occurred between April 2017 and May 2019. Hill had earlier pleaded guilty as a result of a plea bargain to the three charges.

“Thank you to the investigators and attorneys who helped bring resolution to this case,” Jackley said. “Our hearts go out to the victims of sexual abuse, and we remain committed to protecting children from such dangerous offenders.”

The case was investigated by the South Dakota Department of Criminal Investigation and the Sisseton Police Department.

Prosecution was handled by the attorney general’s office and the Roberts County State’s Attorney’s Office.