When the child's corpse is examined the examiner comments there is no rigor and predicts due to this the child must have died only 12 hours before but in reality The rigor is maximum up to 12 hours later and starts to stiffen at 3-4 hours. The rigor usually passes completely at 24 hours postmotem.
The bar-code that Grissom examines is not genuine. If you pause the episode at the right moment, you can clearly see the bar-code's text display the 'E-like' summation symbol as he examines it in Photoshop. No form of bar-code can display this symbol. The numbers on the bottom also change between the scanned-in image and the final image displayed. Grissom then proceeds to scan the printed bar-code with bar-code gun, into the shipping company's website. Not only is the idea that every consumer is expected to have a bar-code reader handy completely ludicrous, the site does not even seem to provide any method to upload the bar-code image. Furthermore, the bar-code itself seems to have been created with random lines instead of being generated as a real bar-code, as it does not conform to any bar-code standard.
When the stand-up comic approaches his car he uses an electronic key to unlock it (with the car making various beeps and honks in the process), but when he gets into the car he puts his hand over the open window to pull the door closed. Clearly the "locked" car's window was already down.