Actually, now that I think about it more, what
@CHICAGO said makes the most sense: Manhattan came out of Cal to obliterate the second shooter and save Angela’s life.
We were wondering (or at least I was) why Angela and Judd only spoke about one shooter at her house. Angela couldn’t talk about a second shooter and Manhattan’s secret out. And Judd couldn’t talk about a second shooter if a second one wasn’t found in her house cuz he only knew about it cuz he was secretly a part of the KKKalvary plus it would tip his hat that he knew about Cal/Manhattan (maybe he witnessed it happen).
Makes me wonder tho: aside from Angela, who was supposed to die, were all the survivors of the white night actually secretly a part of the KKKalvary? Did looking glass survive the white night?