Police say last weekend’s assault is the first of this kind on the trail.
The boy's lockers and belongings were searched, with no sign of weapons or ammunition.
Bloomington Police Department say the Spierer case is still a priority as the anniversary of Lauren Spierer's disappearance approaches.
No officers were injured in the shooting, but the suspect suffered two gunshot wounds and is in surgery.
Gibson, who has confessed to killing two women, was arrested last month in Floyd County.
The suspect escaped custody and jumped several fences while police tried to re-apprehend him.
It’s the start of a new school year officials at Indiana University are collaborating to educate students on safety precautions.
Many critics are asking why it took so long for authorities to broaden their search for missing IU student Lauren Spierer to include a Vigo County landfill.
The autopsy scheduled for Tuesday should determine the cause of death.
The searches over the past three weeks have covered a 10 mile radius from where she was last seen.