Luke liked Dustin, and naturally didn't like Brad.
Now, he just watched this deputy commissioner jump around.
If Brad became commissioner, it would be the perfect opportunity for Dustin to escape being tied down by this swindler.
The higher a person went, the more care they had to take.
As commissioner, Brad would be a lot easier to deal with than now.
At that time, Dustin would be able to see off this stingy boss.
As for George and Misty, it wasn't a bad idea to build a good relationship with them.
The 15th Precinct had jurisdiction over a large area of Clinton.
If they had a personal relationship with the "boss" here, they would receive more support in the area.
It was in the interest of both parties in the long run; they both wanted law and order in Clinton to improve, so a cooperation was worthwhile.
George and Misty hadn't specially come to investigate Luke, or they would've known that he was a NYPD colleague.