In the opening scene, Lindsey rolls out of bed on Danny's side. In the next shot, she rolls out of bed on her side to get her gun and ammo.
At 2:10, when Lindsey drops her gun after shooting Shane Casey, it lands on the carpet on the backside on the gun grip. At 4:42, when Lindsey is remembering the shooting, the gun falls barrel side down, hits the carpet on the clip end, and rolls onto slide lock/grip side. At 4:45, the gun hits the carpet on the clip end, then lands on the right side of the gun.
At 42:30, when Teddy Westwick is shot, you can see a yellow outline around him from the green screen/special effects editing.
The package Stella mailed Lindsey said the NYPD Crime Lab is located at 5885 Broadway, 35th Floor in New York City. 5885 Broadway is in the vicinity of Van Cortland Park in Westchester County, as the Manhattan side of Broadway ends in the mid-5100s. Further, the NYPD Crime Lab is located in Queens, far from any skyscraper with at least 35 floors.