Plain Clothes is a 1988 comedy film directed by Martha Coolidge. The film stars Arliss Howard and was released by Paramount Pictures. As of 2011, it is available on VHS.
Along the way, Nick and Ed narrow the probable motives down to jealousy Bradwood was trading grades for sex with DawnMarie Zeffer Alexandra Powers, the girlfriend of Kyle Kerns Peter Dobson, the leader of the bullies or selfpreservation Bradwood was blackmailing some staff about running a real estate scam on the other teachers. Nicks identity is discovered by Jane Melway Diane Ladd, one of the con artists gang, and it all comes to a head at the Pagan May Fest the schools mascots are the Pagans. Nick and Ed find out that they are probably on the wrong track Chet Butler George Wendt, one of the gangs members is missing and an emotional confession from Melway points to Butler as the murderer not to stop the blackmail, but because Bradwood was engaged to Melway, with whom Butler used to have an affair and whom he still loves. Bradwood also found the love letters in which Butler claims to have killed Melways husband.Butler appears and implicates himself with words and actions. A chase ensues, ending with Nick being cornered finding the evidence that cements Butlers guilt. Nick is saved twice in quick succession, once by a schoolmates opportune distraction, and once by an excellent shot of Eds at the perfect time. Nick makes a date with Robin Torrence, who now knows he is an adult, and the realestate scammers are arrested. Hector looks very foolish. Matt is released from jail and cant wait to get back to school. ........
Source: Wikipedia