Now that we are halfway through “The Assassination of Gianni Versace,” we can reasonably infer that there are no more bodies to fall. The fashion designer Gianni Versace was shot to death outside his Miami Beach villa in the season premiere. The Chicago real estate tycoon Lee Miglin was tortured and bludgeoned, and a New Jersey cemetery groundskeeper, William Reese, was fatally shot, execution-style, in Episode 3. Two more men were knocked off in Episode 4: the Minneapolis architect David Madson and the Navy veteran Jeff Trail.

So as this second season of “American Crime Story” works its way backward in time, we have moved past the body count to what should be the most interesting moment in any serial killer’s story: the moment before he starts to kill.

Yet frustratingly, five episodes in and with four more go to, we are barely any closer to knowing what turned Andrew Cunanan into a pathologically mendacious psychopath, much less a killer.

There is still time to explore that question, but by structuring this narrative in reverse chronological form, the show’s creators have demanded a great deal of patience from viewers — and taxed the patience of this one — as they’ve asked us to bear witness to ruthless, grisly violence.