do you work at the same school where timothy olmstead worked? . >> reporter: jennifer couture is a teacher who substituted for the class one day when olmstead was out. she worries school administrators might punish her for speaking to us about him but backs up what these children told us. when you took over his class, were the black students segregated from the rest of the class? >> yes. as were the special ed students. >> reporter: so special ed students and the black students were not sitting with the white students? >> no. >> reporter: the children, the parents and other teachers say the bizarre abusive behavior lasted for months. finally after continuing complaints, olmstead was placed on leave this past january and then two months later, he resigned. but get this. he's still getting paid. the st. paul school district says he's owed back sick pay. all this has caused a great deal of anger. the three children we talked with and their relatives have filed a civil suit against olmstead and the st. paul public schools, who they say knew about his