Identification of black snake

I’d like to identify this snake (see photo), spotted yesterday in Clearwater, FL. It is black with a white chin. I think the belly (forgot to look) was black with no coloration.

Perhaps it is a Black Rat Snake (Elaphe obsoleta obsoleta) or Southern Black Racer (Coluber constrictor priapus).

It doesn't have the maroon skin coloration of an Eastern Indigo Snake (Drymarchon couperi).

Any ideas? Thanks for your feedback.

 

I have been told by someone that it is a
southern black racer (Coluber constrictor priapus).