A Benton Harbor man who pleaded guilty to sexually assaulting a 13-year-old girl has been sentenced to at least six years in prison. On Friday, a Cass County Judge sentenced 22-year-old Markal Leneal Jackson to between 81 months and 20 years. That’s after he pleaded guilty to two counts of first degree criminal sexual conduct with a minor. Prosecutors say Jackson had been staying with acquaintances at a home in Dowagiac when he raped a girl who lived there. In a surprise move, he pleaded guilty during his trial in June.