INDIANAPOLIS - The parents of missing Indiana University student Lauren Spierer are marking their daughter's 22nd birthday with a plea for information about her disappearance.
In a letter posted on the family's website Thursday, Robert and Charlene Spierer said they are celebrating the day but mourning what might have been.
"Twenty-two years ago today, we were given the gift of another precious daughter. Lauren completed our family. Anyone who knows Lauren knows that she could light up a room without trying," the letter read. "Lauren's quick wit, intelligence and true caring made her someone people gravitated towards. There will never be another Lauren."
In June 2011, the then-20-year-old was last seen walking toward her Bloomington apartment after a night drinking with friends.
While her parents have said they understand their daughter is likely no longer alive, no remains have been found and no arrests have been made.
"(On this birthday,) there will be no gifts mailed to Bloomington, no cake, no candles, no excited anticipation as the celebration of one so loved approaches," the letter read. "We are left only with the gifts the person responsible for Lauren's disappearance has given our family -- despair, heartache and loss."
But Lauren's parents stressed that they remain determined to discover what happened to their daughter.
"We have no doubt that when Lauren is found, the next chapter of this horrible nightmare will begin anew," the letter reads. "On June 3, 2011, a set of parents was born; unwavering in our desire to find our daughter and see that justice is served for a life ended too early."
Anyone with information about Spierer's case is asked to call the Bloomington Police Department tip line at 812-339-4477 or the family's private detective firm, Beau Dietl & Associates, at 800-777-9366.