Thank you very, very much. This is a big help to me. I've just begun researching Frank Krizek, so the info you have provided will really give me a major springboard to really get into it.
I did find listings for Frank's twin sons, Frank, Jr. & Robert in the SSDI. They were b. 2 Jan 1928. Robert d. 15 Sept 1998 & Frank, Jr. d. 20 April 1999.
As I understand it there is a pic floating around out there somewhere which was published in a newspaper which shows Frank Sr. in his Berwyn police uniform standing between his twin sons in their Marine uniforms. I'm guessing that it was probably in one of the suburban papers (The Berwyn Life??). As I say, I just started this research, so I'll probably be contacting the Berwyn Life to see if they have something in their archives.
Thanks again for all your help. I really appreciate it.