The video was captured Tuesday night in the 8400 block of S. Crandon.
The theft, delay, and destruction of U.S. mail is a federal crime. The United States Postal Service - Office of Inspector General said its special agents are now handling the ongoing investigation in coordination with Chicago police.
USPS reminds customers who feel they might be a victim of mail theft or find discarded mail to please contact their hotline at https://www.uspsoig.gov/hotline or 1-888-USPS-OIG.