The gun was found earlier this week. Cesar Cortes, 19, was shot and killed last Tuesday.
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READ MORE: Gun believed to be used in student's shooting death found
The search for the .32 caliber semi-automatic pistol began after investigators believed the suspect threw it out after leaving campus.
No other information about where the weapon was found has been released, but a City of Bellaire spokesperson told ABC13 more information could come next week.
According to sources with knowledge of the case, three students went to a storage area of Bellaire High School because the alleged shooter wanted to show the two other teens his gun. One teenager then walked away from the storage area. That's when he heard a shot.
Sources say the 16-year-old suspect then carried Cortes out of the storage area before running away.
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Last week, a judge ruled that the Bellaire High School student charged with manslaughter in Cortes' shooting death will remain in custody for now.
The video above is from a previous story.
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