I'm pretty sure the guy on the right is Capones attorney Edward "Easy Eddie" O'Hare.

He later turned on Capone and helped the feds put him away. He was murdered in 1939.



Edward J. O’Hare’s auto rests against the trolley pole at Ogden Avenue and Rockwell Street after his murder on November 8, 1939. O’Hare died of two shotgun blasts as he raced his automobile northeast on Ogden Avenue near Rockwell Street in Chicago in a futile effort to outdistance the men who would kill him. (Tribune archive photo)

http://www.defrostingcoldcases.com/cops-take-on-capone-era-murder