Board Thread:General Discussion/@comment-25266931-20170206193307/@comment-26397825-20170211040825

Yang, however, has experience in detective work. She's already been shown navigating the underworldand has contacts she can use who could in turn put her in touch with other contacts. She's not just a brawler, she's also street savvy and can successfully navigate the underworld. How else would she learn that Junior's club deals in information?

So with the right information from Qrow, Yang could be this detective. Pair her up with someone else who could provide backup (maybe Ren or Nora for smarts/strength) and you don't need to introduce a new character at all.