I had the same thing, but when I left new York and came back a new one appeared. The real screwer is that I have all the trinket boxes opened, but it only shows 1/2 in East New York even though I am looking at both opened boxes. I will have to eventually play again to get the final trinket.
50,000-Sherlock Holmes vs. Jack the Ripper-Art Lover 80
100,000-Dragon Age II-I Got Your Back 25
150,000-Assassins Creed III-The New Tea Party 40