First he's gimped - up to satisfy the didacticism of the time (with the trucking industry presenting limited opportunity for a moral, the movie settles on putting the fear of God in us over falling asleep at the wheel),
then his role is reduced to
reaction shots: When Paul finally takes the stand in the courtroom climax, all Bogart manages to squeeze out is «Wull yeah, but...» This is Raft's show, despite the film's studio - sanctioned absorption into the Bogey canon, though Bogart would have his revenge by stealing the lead in High Sierra — and in theory, every one of his Midas - touched career opportunities
subsequent to High Sierra — out from under him.