Complex sentence: Cook County State's Attorney Anita Alvarez's office is investigating possible criminal charges against the veteran officer who shot Johnson in the back during a foot chase after opening fire just seconds after arriving on the scene after Johnson was moving away from police.
Split into simpler sentences: Cook County State's Attorney Anita Alvarez's office is investigating possible criminal charges against the veteran officer who shot Johnson in the back during a foot chase. The officer opened fire just seconds after arriving on the scene after Johnson was moving away from police.