A North Carolina judge has stopped Duke University from expelling a male student who was accused of rape by a female freshman.

Duke, which came under fire in 2006 for its handling of rape accusations against lacrosse players who were later exonerated, has found itself back on the defensive, as it battles a claim by a student that it expelled him without a proper investigation and due process. State prosecutors in the earlier case dropped all charges against the players, declaring them innocent victims of a district attorney's...