Continuity mistake: When Catherine walks up the stairs, Horatio Caine aims his gun upwards. In the next shot he has his arms down. (00:36:10)
Continuity mistake: When Gil and Catherine catch the couple in the bedroom, they are all sitting in the living room. Amanda is drinking a soda and it is about half full. Gil then asks for the straw. When we look at the soda again, it's full.
Continuity mistake: Season 5, episode 11 'Who shot Sherlock?'. In the scene where Sara Sidle sits down at the victims desk and computer, in the first shot you see the top corner of the notebook lid, saying IBM, then when you see the screen it says DELL on the bottom of it, and then in the next shot you once again see the lid with the IBM mark.
Continuity mistake: In the scene where Warrick pulls the piece of clothing from the toilet, the amount of water and dirt in the bowl changes between each shot. (00:14:00)
Continuity mistake: When Nick is staring intently at the doctors lapel area, the camera zooms in and we see some lint on the doctors left lapel. When Nick asks Catherine to get the tape on it, Catherine approaches the suspect and she starts to put the tape on the left lapel, but when the camera zooms in for a close-up of her getting the lint, the tape is being applied to the RIGHT lapel.
Continuity mistake: While Kelly is being interrogated in the interview room by Nick, her hair changes between shots. Close-up it hangs loose. In the wide shots both sides are tucked behind her ears.
Continuity mistake: The DB in the desert is in funeral pose. Sarah notices something on his hands, which are layed one on the other in a close shot. Cut to a wide shot and the top hand is off the other. Cut again to a close shot and it is once again atop the other.
Continuity mistake: In the bit where Nick and Warrick decide who is going in the pool, Nick loses and begins to remove his top while still wearing his latex gloves. The camera switches to a different angle and while he is still taking his top off, his gloves have disappeared.
Continuity mistake: When Grissom enters the cage in which the woman is found, he goes to the wastebasket to examine the pen that rolled on the floor. As he first picks it up, he grasps it right at the point where the black grip section meets the gray barrel section. As the shot changes and he continues bringing it up to examine it, he is now grasping it near the end of the gray barrel. As it is supposed to be a continuous shot (conversation is uninterrupted the entire time), there is no time for him to change his hand position.
Continuity mistake: When Grissom's car window is broken in the first shot where you first see the break there is hardly any glass left in the frame and yet when he is at the gas station there is an almost perfect circle of broken glass and a lot more in the frame.
Continuity mistake: Nick is eating a hot dog when he's handed a warrant. Depending on the camera angle, he goes from taking a bite out of the hot dog to holding the hot dog in one hand and the warrant in the other simply with camera angle changes.
Continuity mistake: When Sara is trying to match up bite plates. In the first two close-up shots of Sara's face, you can see an out-of-focus shot of Greg's sleeve on the right side of the screen, seconds before he actually appears in the scene.
Continuity mistake: When Brass and Grissom first enter the house of Ken Willard (the guy in the Polaroid), and Greg makes a noise at the door, the two of them turn around to see him. Then the angle changes, and they turn around again, repeating motion.
Big Middle - S5-E16
Continuity mistake: Season 5 Episode 16 "Big Middle" Sara Sidle marks a triangle on a bed sheet around evidence and then proceeds to cut along the inside of the triangle lines in order to remove the evidence from the sheet. In the next shot, Sara is shown removing the cut out from the sheet, which now has been cut along the outside of the triangle lines.
Continuity mistake: Outside the brothel, there is an orange post next to the old man's trailer. Suddenly, it is gone in the second scene where the old man is approaching. In the third scene there is one again, but this time it is an orange cone instead of an orange post.
Got Murder? - S3-E12
Continuity mistake: When Catherine is looking through the contents of the birds nest, she takes out the teething ring and places it on a pile on the left. When Gil comes in and asks her what she has, the shot shows the nest and the teething ring is back in it.
Continuity mistake: Supposedly, Paul Millander was 10 years old when his father was killed. A newspaper report read by Sara in 1x08(Time 39:45) says this. It also says that his father died August 17th, 1959. In 2x13(Time 43:18), in the last scene, Grissom looks at Paul's birth certificate. It says that Paul was born August 17th, 1956, which would mean that he was actually 3 years old when his father died. (00:39:45 - 00:43:15)
Continuity mistake: When Grissom and Catherine are looking at Rebecca McCormick's dead body, her mouth is closed in the first two shots, and when we see her again it's open.
Continuity mistake: When Grissom, Brass, and Greg go to the house of the guy in the Polaroid, Brass picks up a credit card from a table. First, he is holding it by his middle finger and thumb from the back, then the shot changes to a close-up and he is holding it with his index finger and thumb along the sides. Then, we return to the previous angle and he is once again holding it with his middle finger and thumb from the back.
Continuity mistake: When Grissom is on top of the box, talking to Nick, and he tells Nick to put their hands together, you can see that from shot to shot, the alignment of their hands changes. In one shot (from Nick's angle), Grissom's hand is higher than Nick's, as well as Grissom's index finger lines up with Nick's middle finger. In the next shot, their hands line up perfectly. The alignment changes throughout those few shots.
Answer: He doesn't have the authority to arrest him - when anyone is arrested in the show, a police officer does it. Also he tells Ty that he is going to be submitting his case findings to Ty's insurance company, who would no doubt contact the IRS, who then would have him arrested for fraud etc.