Beyer was accused of abusing his 21-year-old son in early 2013. As part of the plea agreement, charges connected with the fraudulent cashing of the son’s Social Security checks also were dropped, said Kevin VanderSchel of the U.S. Attorney’s Office. Two others also were prosecuted in the case: Beyer’s wife, Rebecca, and her son, Ryan Smith.

Rebecca Beyer was convicted of first-degree kidnapping and other charges last July and died of cancer last month while serving a life sentence in prison. Smith pleaded guilty last May to a misdemeanor accessory charge and was sentenced to 180 days in jail.