Towards the beginning of the story detectives enter the house of the murdered victim finding a laptop. The detective says the files are gone because the computer was "defragged". That is factually incorrect. Defragmenting a computer actually rearranges parts of computer files across the sectors of the hard drive making access to files faster. It does not wipe out files. Reformatting a hard drive removes the Windows directory telling Windows where the files are leaving the files intact but difficult to access and find. Performing a Gutman Pass, or "overwriting" files makes them unreadable. Encrypting the drive would make the files completely inaccessible.
A respirator is a device designed to protect the wearer from inhaling particulate matter, including airborne microorganisms, fumes, vapors and gases. The correct term for the machine someone with Amyotrophic lateral sclerosis, or any condition that affects a person's ability to breathe normally, is a ventilator. A medical ventilator is a machine designed to move breathable air into and out of the lungs, to provide oxygen for a patient who is physically unable to breathe, or breathing insufficiently. Calling a ventilator a respirator is a common television and movie mistake.
In the teaser, the prostitute turns her head in reaction to the sound of the car explosion a split second before the sound is actually heard on the audio track.