Authorities released new video on Tuesday, showing the moments leading up to the shooting.
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Police said it shows the suspect, 37-year-old Cristobal Santana, of Chicago, pulling out a gun and firing 10 shots at trooper Dakotah Chapman-Green.
Investigators said Santana then severely beat the trooper with the gun and took off. He was arrested a couple hours later and has been charged with attempted murder.
Surveillance video shows the take down. Santana was hit by a police vehicle. ABC7 froze the video before the impact.
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Chapman-Green was shot several times, but is expected to recover. On Tuesday, his mom thanked everyone for their support.
Illinois State Police give update on trooper shot; family speaks out
Santana also remains in the hospital. He's believed to be a suspect in the murder of special education teacher Adrianna Lopez in Chicago, according to that victim's family.