learning disturbing new details tonight about a former christian school teacher in sioux center-- who's charged with a total of 140 criminal counts involving sexual misconduct with students. here's a look at what "9 investigates" has found out from police affadavits we've obtained and reviewed. 41- pages of documents outline the case against 36-year -old curt van dam -- who once taught fifth grade at sioux center christian school. the documents detail the abuse van dam allegedly committed involving numerous students -- some of whom we now know were under the age of 12-years old. the reported abuse taking place both on and off school property -- and involving multiple victims each year over a four year period from 2013 to 2017. at least one victim telling police they were abused for that entire four-year time frame. sioux center's police chief says all 10 officers on his force have worked on this case to " "the community was shocked and very saddened when they found out what is really going on and what has transpired. there's a lot of high emotion in our community right now. a lot of anger, a lot of embarassment, a lot of disappointment , resentment. but we will get through this. i firmly believe that justice will prevail. we are a strong community and we will stick together through this," the police affadavits obtained by "9 investigates" reveal the abuse allegations against van dam ranges from genital touching to soliciting children to engage in sex acts. sioux center's police chief telling us that in 44 years on the job -- he's never seen a case of this magnitude.