KANSAS CITY, Mo. (KAKE) - A 36-year-old Wichita man has been arrested and charged after he allegedly picked up a gun discarded during a mass shooting incident at the Kansas City chiefs victory parade and rally. 

KMBC reports Jose L. Castillo is charged with unlawful possession of a firearm after being arrested by Kansas City police. 

Court documents state that officers responding to the shooting on the west side of the main stage at Union Station on Wednesday were directed to Castillo by a witness who observed a fight. The witness reported Castillo pick up a handgun that was dropped by one of the people fighting before the shooting, then walk away.

Police took Castillo into custody and found him in possession of a black Glock 22, according to the documents. He told officers he was near the gunshots, saw the gun on the ground and decided to pick it up.

After his arrest, Castillo said he was walking toward the restrooms when he heard what he thought were fireworks and saw others running from the area. He said he saw a black handgun on the ground and thought probably belonged to an officer. He said he picked it up with the intention of returning it to police.

Police said Castillo was previously convicted in Kansas of felony conspiracy to distribute marijuana. It is illegal for him to possess a firearm.