He was being investigated by federal officials but he somehow managed to 'put them off the/his scent'.
Scientists are 'on the scent of' a cure. [=are looking for and are close to finding a cure]
The reporter was 'on the scent of' a big story. [=was following/investigating a big story]
(..) Air fresheners are high margin, right? At cents wholesale, yeah. Right. So I'm thinking we reorganize the display, separate the food scents from the nature scents. I mean, does bubble gum belong anywhere near ocean spray? No. And pine is still our biggest seller, right? (..)2013 TvShow: Breaking Bad Title: Blood Money Season: 5 Episode 9