Watching the Daniel Penny case in New York it seems the jury came back with a note saying they are deadlocked. Consequently the judge has issued an Allen charge to try to get a verdict.
A couple of questions:
The Allen charge arose from a USSC decision about a federal case. So why does it apply in the completely different jurisdiction of New York's State criminal court? It doesn't seem to be a civil rights issue that would be incorporated to the states, more a matter of procedure.
How often does an Allen charge actually get a verdict from the jury? I'm pretty sure were I on a jury and received such a charge I'd be unlikely to change my mind, since, by that time, I would have already taken my responsibility very seriously. Especially so were I a jury member on a homicide trial.