WEST LAFAYETTE, Ind. (AP) _ Purdue University police are investigating a possible hate crime stemming from a protest march.
 
  Police said Tuesday that a placard left as part of a display at a building housing university administrative offices was defaced with a racial slur and a stick-figure drawing of a body hanging from a tree. 
 
  The placard was left at Hovde Hall on Monday by protesters upset over the recent discovery of the words “white supremacy” written on a mirror inside the campus’ Black Cultural Center.
 
  Police say they’re investigating the defaced placard as a hate crime since property was altered or destroyed and the conduct was apparently motivated by bias. 
 
  Purdue said Monday that the “white supremacy” inscription was an unintentional transfer of words from a note during a seminar.