The security guard was identified as Richard Castellana, 55, of Tinley Park, according to the Lake County Coroner s Office. Castellana was a retired Cook County sheriff s deputy.
King was taken into custody in a wooded area near 43rd Avenue and Garfield Street following an extensive search by law enforcement, authorities said. A backpack containing a handgun and approximately $9,000 in U.S. currency was found near where he was apprehended, according to a probable cause affidavit.
Sheriff s deputies released surveillance photos of the suspects late Friday afternoon.
Police were continuing to search for the second suspect Sunday.
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The FBI was searching for a second person believed to have been involved in the fatal shooting of a security guard during a robbery at a Gary, Indiana, bank.