what none of them knew was that someone else was watching, too, sergeant chris laveck and his team of undercover detectives. >> it's just a cat and mouse game is really the best way to describe it. >> police had been surveilling the men for weeks, and our cameras were with them on the way. >> gary stevenson, wearing a dark long-sleeved t-shirt. >> why would police follow two landsca landscapers? because the cops knew something else about these two. they were thieves. this is surveillance video of the men with another accomplice at a marshal's clothing store. >> surveillance video. they're ripping you have tags and putting stuff in the car. >> they cut off security tags and hide merchandise in bags. >> what kind of stuff are they steal sng. >> on that occasion just clothing. he cut open a box of men's cologne and had taken some boxes. >> here they are another day at lowes. they pick up some window screens and simply walk out without paying for them. so when they were spotted blowing leaves in the neighborhood, cops suspected they were up to no good. and that's when the suspects approac