The Lineup - Lefty Jenkins' Room
The cab driver who was shot by the policeman as he made off with the bag in the opening scene has been identified as Lefty Jenkins - "... one of the best wheelmen on the coast". The police search his rented room "at 11 Kent Street" but don't find any evidence to identify the drug ring.
Then ... The police car heads up Mason Street towards Union from Filbert.
... and Now, this view, with Angel Island is in the distance, hasn't changed appreciably in over 55 years.
Then ... They turn into a narrow cul-de-sac. This is indeed Kent Street off Mason between Union and Filbert (map). What's with all of those newspapers on the street?
...and Now, the only significant change in this view is the house at the end of the street.
Then ... They enter from Kent Street, supposedly No. 11, but actually the rear door of a building which fronts onto Union Street ...
and Now ... the rear entrance has been replaced by a garage door.