S1E5 The Six Ungraspables SPOILERS

Two questions here about mysterious appearances. In the first scene is the plumber supposed to be the fitness instructor and if so why doesn’t he recognize or at least expect Malvo lurking in the bushes? (Side question is there any relevance to Klubeck on the side of the truck?) A bit later, who is the crooked officer giving up the file on Malvo in the alley and how did Wrench and Numbers get a guy on the inside,

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