Critics say the current law is too vague.
The victim told investigators she was standing and waiting for the exit doors to open on a Bloomington Transit bus Wednesday afternoon when another passenger began striking her in the head.
A Bloomington man was killed, after being swept away in his car.
Bloomington Police say Spierer was last seen around 4:30 a.m. on June 3, 2011 on West 11th Street in Bloomington on her way home after a night out with friends, but never got to her apartment.
The 20-year-old man was taken to a hospital, but died from his injuries.
Lauren Spierer, a student of Indiana University, went missing in 2011 from Bloomington, Indiana after a night out with friends.
Police continue to investigate the shootings, as the motive remains unknown.
Officials say the woman said she had known the suspect for years, but had recently connected with him on social media.