"After Cana," by Terence Faherty, in Ellery Queen's Mystery Magazine, September/October, 2012.
Keane is a troubled guy with a murky past, explored in previous Faherty tales, and when the current story opens he is accompanying a friend to the wedding of a couple he doesn't know. The minister's familiar sermon on weddings creating a new community gets him thinking about people in his past, but a few days later the new couple is killed on their honeymoon, and that's what really gets him thinking.
Was it, as it appeared to be, a meaningless mugging death, or is something even more sinister going on? Keane cleverly traces the roots back to an event that happened fifty years ago, and then forward again to the present day. The story is well-written with nice characterization of the minor players, which help Keane reach the final deduction. A nice piece of work.