The engineering company the commission has hired to conduct the on-site accident investigation, is seeking photos and video of the stage.
State Fair Spokesman Andy Klotz said policies and procedures are also under scrutiny.
The family of a man killed in the State Fair disaster has filed a tort claim notice, a first step toward a lawsuit against the state of Indiana.
The victim was a 24-year-old cheerleading coach from Ohio.
Attorney Kenneth Allen is representing the family of Tammy Vandam, who was killed in the incident, and her life partner Beth Urschel, who was severely injured.
22-year-old Jennifer Haskell of Fort Wayne died today after being injured in Saturday's stage collapse.
Train and Maroon 5 take the stage tonight for what now is a benefit concert for the victims of Saturday‘s stage collapse at the State Fair.
Governor Mitch Daniels called the stage collapse at the Indiana State Fair a "fluke." Now a meteorologist from the Weather Channel says that's not accurate.
Estimated winds at the fair grounds were 60 to 70 MPH… that’s the same as an F-0 category tornado.
Indiana State Police officials say investigations like this can take weeks or months to complete.