The plot of Dani Reese and the FBI investigation in the final episodes of season 2 was written because of Sarah Shahi's pregnancy.
When they have their weapons drawn, Reese follows the correct procedure and doesn't have her finger on the trigger, while Crews always has his finger on the trigger. A small detail to indicate that Crews doesn't play by the rules.
The background story is that Charlie Crews, while an LAPD officer, had been part-owner of a bar. In California, Alcoholic Beverage Control (ABC) laws prohibit a peace officer or spouse of a peace officer from having a liquor license.
Melissa Sagemiller played Constance Griffiths in the unaired pilot but was replaced by Brooke Langton for the series.
Crews license plate number in S01E03 spells 2QRI455, which can be read as too curious.