Book reveals new details after 13 years

Lauren Speirer has been missing since 2011. (Official updates from Lauren Spierer from her family)

(NewsNation) – A new book, “College Girl, Missing: The True Story of How a Young Woman Dispared in Plain Sight,” reveals new information about Lauren Spierer’s disappearance after 13 years without answers.

Spierer, a student at Indiana University, went out for an evening with friends. She was never seen again. The last people who saw her said she was extremely drunk when a man took her back to a townhouse complex.

The book, written by journalist Shawn Cohen, was written with the cooperation of Spierer's parents and included new details uncovered by a private investigator the family hired after becoming frustrated with the Bloomington police's lack of progress.

This includes official statements from Corey Rossman and Jay Rosenbaum, among the last people believed to have seen Spierer alive and who are described as combative and defensive. It also includes information from a previously unreleased video showing Rossman and Spierer extremely intoxicated.

The book also examines and rejects a number of theories and suspects circulated online by people who followed the case, including a serial killer active in the area, a man convicted of another kidnapping, and an accused police officer of child exploitation.

The case remains unsolved, and the young men who were last with Spierer, including Rossman and Rosenbaum, retained an attorney shortly after his disappearance. Little is known about her final hours, and no evidence remains that she left the townhouse complex alive, as Rosenbaum claimed.

Bloomington police said Rossman and Rosenbaum cooperated with investigators. However, the ministry's investigation was criticized by community members.

When NewsNation covered the Spierer case, Bloomington police declined to be interviewed, citing department policy.

Spierer's parents continue to ask anyone with information to come forward and help them finally understand what happened to their daughter. Anyone with information can call the Bloomington Police Department at 812-339-4477.