Prompt: Erik is a moody private detective and Charles seeks his help to find his missing sister Raven (or the other way around, idk). There are fedoras and trenchcoats and suspenders and gun holsters and rainy nights and monotone first-person narration and blinds and private office doors and furious smoking and dangerously beautiful female singers all around. Also maybe mobsters.
Fit in as many of the kids as possible/plausible (Also other characters, Emma, Azazel, etc).
Bonus if: 30s/40s slang words are used (http://xmen-firstkink.livejournal.com/2439.html?thread=2722695#t2722695)

Fill: On LiveJournal (http://xmen-firstkink.livejournal.com/2439.html?thread=2753671#t2753671)
On FanFiction.net (http://www.fanfiction.net/s/7206038/1/Dial_M_For_Mutant)