The parents of two former North Linn High School students are suing the school district.Loren and Virginia Staton and Kris Michels allege a former teacher gave their sons marijuana and alcohol during school hours and the district should’ve known about it. Last fall, a jury found 60-year-old Ben Rowland of West Union not guilty of charges in the case. The boys’ parents are suing the school district, the superintendent and the former principal.