An Alton man has been sentenced to 18 years in prison as a result of his guilty plea to predatory criminal sexual assault of a child. 34-year-old David Armstrong admitted earlier this year to forcing his wife's 5-year-old daughter to perform sex acts. His wife pleaded guilty to the same charges and was sentenced to 20 years in jail last week.
Madison County State's Attorney Tom Gibbons says they both pleaded open, and his office agreed to a cap of 20 years.
He will have to serve at least 85% of his sentence, which means a little more than 15 years, less time served. In the case of 23-year-old Danielle Armstrong, that would be at least 17 years, minus time served. The two have been in custody since July 11, 2012.