A 27-year-old Port Huron Township man pleaded guilty to eight charges Monday involving sexual abuse of children. Nicholas Belkiewicz pleaded guilty to multiple counts of child sexually abusive activity including three counts of second-degree criminal sexual conduct with someone under 13. Belkiewicz was originally facing 13 charges and remains in the county jail on a $1 million bond. Belkiewicz was arrested in February following an investigation by the St. Clair County Sheriff Department. He is accused of abusing children ranging in age from 4 months to 11 years old.