[Denis]

I found only one "Robert Serrano" listed in all of Illinois. And, bingo, he lives in Chicago.

Serrano, Robert
3721 Ashland Ave
Chicago
IL, USA 60613-3601
Phone: (773) 5492563

I also did a reverse search on the address itself, to see who lives there today.

Allen, Michael
3738 Wilton Ave
Chicago
IL, USA 60613-3966
Phone: (773) 9293306

Rosbolt, John
3738 Wilton Ave
Chicago
IL, USA 60613-3966
Phone: (773) 6652361

Good luck.