
Looks female to me too, with the bar extending up, and the profile being less steep than a normal male.
There are extenuating circumstances that sometimes influence gender presentation.
Since the JDs owned the tank first, a new male cichlid might show female characteristics to lessen territorial attacks from the male JD.
It is always dangerous to add a new cichlid to an already established pairs tank, and any new cichlid will instinctually realize its position, and do anything to save itself.
I've had cichlids that I thought were females, change to male characteristics overnight, once the dominant alpha male died, or was removed.
That said, it is often better to add non-cichlids to an already established tank.