Corrected entry: When the detective is talking to Warrick about 'la lluvia de los peces,' he calls him 'Rick' ("Point is, Rick, they gotta come from somewhere").
Corrected entry: In the scene where Lindsay is being questioned she says that the car driver got out of the car, then Eddie (Lindsay's father and Catherine's Ex) fell out of the car and into the water. This is not possible. The passenger side door was closed and as the car was on an angle and wedged against the ground and unable to open. It is not possible that he fell upwards and out of the driver side door.
Correction: Eyewitness testimony is notoriously unreliable - a case can rarely be tried on that alone. In this case, the testimony is even more unreliable, as it comes from a child who was in grave danger at the time and was easily confused. The CSIs would not take what she said as the exact truth, but rather a starting point in the absence of anything else.
Corrected entry: Catherine tells the snuff film producer that they know he was infected with HIV by accidental blood transfer from the actress he killed because they 'tested the DNA of the HIV'. No, they didn't. HIV is a retrovirus - it has no DNA. It has RNA, a far simpler nucleic acid which is completely distinct from DNA. Catherine is a scientist, trained and experienced in genetic 'fingerprinting' - she would never make a mistake like that.
Correction: On the other hand, the producer in question isn't a scientist, trained or otherwise. She has to use terminology that he'll understand, rather than being 100% accurate. It's not the actual truth, but, you know, people do that sort of thing when they need to convince people. Most laypersons know about DNA, but few are familiar with RNA. And police are entirely allowed to lie to you, so that's not an issue either.
Abra Cadaver - S3-E5
Corrected entry: When Catherine and Nick are investigating the rock star's death and find the needle in his arm, why wouldn't they have just checked for prints on the syringe? In the flashback later on, it is shown that the murderer did not use gloves, and therefore her prints should be on the syringe.
Correction: The scene and show did not remotely indicate whether or not the villain wiped their fingerprints or not, which most guilty people do. Nor did the sequence indicate at all how much time the crime scene took place over as oppsed to time spent on screen. These two concepts together imply a legitimate counter to your mistake/.
Blood Lust - S3-E9
Corrected entry: In this episode, the CSIs discover that the father of the murdered boy had a handgun registered to him that was found at the crime scene. The gun was registered in California. California does not have handgun registration and prohibits any local registration laws.
Correction: In California they don't register guns but they keep records of who they are sold to.
A Night at the Movies - S3-E19
Corrected entry: Greg Sanders while reviewing evidence, tells Stokes the song "He Ain't Heavy (He's My Brother)" is by Harold Melvin. It is actually a song by The Hollies.
Correction: Character mistake.
Correction: He's shortening Warrick's name, like how Grissom goes by Gil instead of Gilbert.
Xofer