Searching for Jack Holt, 75, formerly of Chicago (now San Diego?)

I am on a mission! I want to help my friend, a 75-year-old man in Chicago who is heartbroken because he hasn't seen his lifelong best friend, Jack Holt, in years.

Jack (or John) Holt would also be about 75 today. About 12 years ago, Jack moved from 6938 W. Medill in Chicago to the San Diego area to be with his sister, Joan Holt, and his mother, Mrs. Arthur Holt (unsure of her first name). Joan Holt is retired from working from the San Diego County district attorney. Mrs. Arthur Holt, who would be in her 90s now, worked for the Sec. of State's office in Illinois. Last my neighbor knew, Jack Holt had never married or had children.

This is all the information I have about the family. My friend doesn't have a computer and is struggling with loneliness and other emotions related to aging. He misses his friend, who he describes as being "like a brother," and it would mean the world to get to talk to him again after all these years.

For younger generations like mine (I'm 31), staying in touch or finding "old friends" is no sweat. We use Facebook and cell phones and don't bat an eyelash. But my friend has no computer and no way of tracking down his "brother" at a time in his life where reconnecting would mean so much.

If you have any info or suggestions that might help me find Jack Holt or his family, I will greatly appreciate it -- and you'll make a huge difference in someone's life.

Thanks!