William Mark McCullough never quite convinces

William Mark McCullough's contribution as Actor gives Murder RX (2020) a more specific texture. I wanted more specificity, especially in the emotional transitions. The work never fully settles into the rhythm of the movie. Several choices feel too broad for what the scene seems to require. It is not a careless performance, but it feels under-shaped. The performance is functional, but it does not leave much after the scene ends. My reaction is mainly about this specific film, not a judgement on the performer overall.