Who is the character in the story A Dip in the Poole by Bill Pronzini?

I'm not sure which character you are talking about but the three main characters are...

- Andrew J. Stuyvesant (the man who was robbed)

-man (he catches the woman stealing Andrew's items and he calls himself the Chief of security, but in the end we find out that he was attempting to rob Andrew)

-woman (who steals Andrew's wallet and pin, but gets caught)