Hi, I am new to this but I would like some info please.  I live in Tombstone, Arizona and my wife and I like going to the thrift stores in the area.  We were in a Sierra Vista, AZ thrift store and I found a blue baseball cap with the USS INDIANAPOLIS on it.  I know of the history of the INDIANAPOLIS so I picked it up.  Before I put it on, I looked inside the cap, and it read " JAMES E O'DONNELL WT3 SURVIVOR"  I didn't put the cap on, and came home to do some research.  I now have this cap in a display in my store in Tombstone along with a picture of Mr. O'Donnell and a model of the INDIANAPOLIS. 
I am interested to know if Mr. O'Donnell lives in Arizona and how this cap came to end up in a thrift store.  Any info would be appreciated!  I would like to contact Mr. O'Donnell regarding this cap if possible.  Thank you

Survivor Jimmy O'Donnell lives in Indianapolis.  It doesnt surprise me that you found a cap autographed by him in Arizona though!  He autographs and sells many items - caps, books, etc.   He does alot of presentations about his experience as well. 

Sad to think that this was in a thrift store, but guess someone bought it or was given it as a gift and decided they no longer wanted it.  What a treasure you found.