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001017P.pdf   10/10/2000  USA  v.  Mary Jane Johnson
   U.S. Court of Appeals Case No:  00-1017
   Eastern District of Arkansas   
   Criminal Case. Government's interlocutory appeal of grant of 
   motion to suppress for failure to disclose expert witness. 
   Government's certification that evidence is material is sufficient 
   to support jurisdiction. Although government broke its promise 
   to supply discovery, district court abused its discretion in striking 
   expert testimony without establishing prejudice and court should 
   have chosen less severe sanction. District court's order granting 
   suppression motion is reversed.