Who called from 8474852336

Some guy saying he is an investigator named Siegal calling from Illinois and giving a case number and wants me to return his call. I've looked up the phone 847 485-2336 and found that it is in fact a Illinois phone number Arlington Heights, Des Plaines Elgin.

I'm getting the same guy saying the same thing. I've looked up the case number too and it pulls up an old 1989 case that has nothing to do with me.

Where did you look up the case number? Did he say what company he is with?