Spierer, an Indiana University college student disappeared last year. The skull was found a week ago in a river about 60 miles from the campus where Spierer was last seen.
This weekend, Lauren's father posted a message on a Facebook page dedicated to his daughter.
He wrote in part, "in the days ahead, a family will have answers they have been desperately seeking. Will it be ours? When will you end this nightmare for our family?"
WAKE UP WITH EYEWITNESS NEWS! Click here to download the WABC Eyewitness News Alarm Clock app from iTunes. or search WABC or 7online in the app store.
Get Eyewitness News Delivered