Tripp is shown wearing dark grey/black jeans at the beginning and throughout the story. At the end, when he's sitting in the ambulance the jeans are suddenly blue.
When Weinstein and team enter in the bank they scramble or in other words shuts off all signals but later we see Gates using a laptop to surf the internet without an ethernet cable which means he's using wifi which isn't possible if all signals are jammed.
The gun used to kill the very first victim is a Beretta 92FS or US Army M9. It is a double-action handgun with open hammer design. Judging by the trigger position, the pistol has already been cocked, but the hammer is not. Moreover, we see the finger pull the trigger and the gun fire without any movement of the hammer, which is impossible in this situation.