A memorial was held at Metropolitan Apostolic Community Church of Christ in Chicago's Bronzeville neighborhood.
Petty died last month after a long battle with lung cancer. He was 79.
RELATED: Longtime ABC7 reporter Bob Petty, one of first black reporters on Chicago TV, passes away at 79
Former ABC7 reporter Bob Petty passes away at 79
Petty was one of the first black reporters on Chicago television. He started reporting at ABC7 in 1971 and retired in 2002.