At one point the calibre of the murder weapon is identified as a ".41 Ruger Magnum". Ruger makes guns, not ammo. And at this point, they don't have a weapon. The bullet hole in the victim may well have been made by a .41 magnum, but it might've been a .44 or a .45, too. And since they don't have the spent round, they still can't be sure.
Characters consistently pronounce RFID as R-FID. RFID stands for radio frequency identification. It is pronounced as separate letters. It is a conjunction of RF and ID. You pronounce it arrr--eff--eye--dee. Saying arrr-fid does have a pirate cachet, but it is wrong. Later in the show they do correctly refer to HVAC as H-VAC, which is inconstant but accepted usage. HVAC stands for heating ventilation and air conditioning. It is more proper to say it as separate letters as well, since AC is a common acronym for air conditioning.