INDIANAPOLIS (AP) _ The parents of an Indiana University student missing for more than 18 months are marking their daughter’s 22nd birthday with a nationwide plea for information that might help them find her.
 
  Lauren Spierer went missing about 4:30 a.m. June 3 after a night of partying with friends in downtown Bloomington.
 
  WRTV-TV reports Robert and Charlene Spierer of Greenburgh, N.Y., said on their website Thursday that they understand their daughter is likely dead even though no remains have been found and no arrests have been made. But they stressed that they are determined to find out what happened to her.
 
  Anyone with information about Spierer’s case is asked to call the Bloomington Police Department.