By Rick HowlettLouisville attorney Teddy Gordon has filed a new lawsuit challenging Jefferson County Public Schools' new student assignment plan.Gordon filed the suit Wednesday in Jefferson Circuit Court on behalf of parent Scott Arnold, whose five year old son was unable to get into Cochrane Elementary School near his home for the upcoming academic year and was assigned to another school across town.Gordon contends the school district is in violation of a decades old state law that says parents should be allowed to enroll their children in the school nearest their homes. He says the state law takes precedence over the new assignment plan that was prompted by a 2007 U.S. Supreme Court decision.JCPS officials say they're confident the suit won't prevent the plan from moving forward.Gordon argued sucessfully against the previous JCPS desegregation policy in the high court case and has mounted challenges to the new assignment plan. They were dropped after parents reached an agreement with the district.