Factual error: Ryan, the laboratory technician, eats his lunch of burger and fries while discussing a murder case with Assistant D.A. Claire Kincaid. Trouble is, they are in his laboratory. No lab technician ever, ever eats or drinks in a laboratory - it is the most basic lab protocol imaginable. He could contaminate his samples in any one of a hundred ways, he inevitably contaminates his gloves or fingers with residue from his meal and he risks poisoning himself with accidental transfer. This is not a character error - lab security is hammered into science students starting with the first day of first year and number one on the list is never, ever eat or drink in your lab.
Factual error: Detective Nina Cassady (who was introduced towards the end of Season 17) frequently wears casual tops that show far too much cleavage for a police officer on duty. If she showed up for duty dressed like that she would be sent home to change.
Factual error: While discussing the death of a car accident victim with detectives, the pathologist Dr Elizabeth Rodgers takes out a french fry, seasons it with mayonnaise and eats it. She is in the morgue, wearing bloodstained scrubs. Nobody ever eats or drinks in a morgue. This is not a character error; eating and drinking in a sterile laboratory environment is absolutely forbidden and this is taught to medical and science students from day one of their degree courses. In fact she would not even have food in there in the first place.
Executioner - S18-E9
Factual error: Yost attacks and kills an innocent man, believing him to be Dr. Horace Garrison, a physician who administered a faulty lethal injection to a condemned prisoner, reducing him to a vegetative state rather than killing him. The problem is, medical doctors never, ever participate in an execution except to certify death, a legal requirement. They do not, ever, take an active role in killing the condemned person.
Factual error: Further to the error regarding eating in the morgue, in this episode Dr Rodgers happily munches on a sandwich with a dead body on the slab less than a metre away. As has been pointed out, nobody ever eats or drinks in a morgue.
Plot hole: At the end of the episode McCoy and his team tape a conversation between Melissa Corbin and her mother Lorraine in order to record her admitting to murdering Alan, her first husband. Trouble is, she says nothing incriminating. The closest they get is Lorraine asking her why she killed Alan, and she replies "You didn't have to sleep with him." That means nothing, and in fact Lorraine says absolutely nothing of any legal significance during the entire conversation.
Factual error: While assisting Detectives Lupo and Bernard, the librarian in the New York library map room handles maps dating from the eighteenth and nineteenth century in a bizarrely cavalier manner. He does not wear soft cotton gloves, and flips the pages of the map books over as if they were modern books. Such maps would be extremely fragile and would never be handled roughly the way he does, and they would not be stored in plastic folders anyway. They would be stored flat in individual glass cases, and they would never, ever be touched with bare hands.
Other mistake: When they are showing the rap sheets for the Cambodian man, the race on the sheet says Caucasian when he is Asian, and for the African American man, the sex says "F" when he is male.
Blood Money - S10-E8
Visible crew/equipment: During the court case when Hamilton Stewart is taking the stand and answering to McCoy you can see the white screen in the reflection of his glasses very clearly.
Continuity mistake: When Lt. Van Buren and the victims mother are talking in the kitchen, the cabinet behind Van Buren changes from opened to closed several times.
Old Friends - S4-E22
Continuity mistake: Whilst Stone is looking at the pictures of the mobsters (as he is talking to Ann Madsen), he is holding the photos quite close together. The shot changes to a wide shot of the people in the room and the space between the photos is considerably wider than before.
Continuity mistake: When the murdered female lawyer is discovered, she's lying on her right side with her feet toward the direction of entry. In the next scene where the detectives view the body, she is on her left side with her feet pointing toward the window.
Visible crew/equipment: After Dr. Murphy walks back in the operating room, there is a man with a boom microphone headset and paper against the right wall. (00:01:40)
Continuity mistake: During an interview with ADA Southerlyn, one of the former patients states when she woke up, her left side felt like a lead weight. She was told she had a stroke while under anesthetic. However, the entire time she is talking, it is the right side of her face that is exhibiting signs of the stroke.
Continuity mistake: The detectives determine that the victim's cell phone was found in a trash can near the entrance of the Lincoln Tunnel. Later, when they are interrogating a suspect Detective Greene tells him "You tossed the victim's cell phone at the entrance to the Midtown Tunnel."
The Torrents of Greed (2) - S1-E16
Continuity mistake: The opening title card reads "Three Months Later." Given the dates from the end of Part 1, this episode takes place two months later.
Plot hole: During the beginning moments when the couple go to the top floor, as they are going to the roof they discover a lot of smoke on the penthouse floor which leads them to seeing the charred corpse in the hallway. The only problem is that with the smouldering body wouldn't it have set off the smoke alarm or fire alarm? The building is a very posh apartment block and they are on the penthouse floor making the likelihood something as basic as a fire alarm would be triggered. The killing was more in the heat of the moment and most likely the killer burned the body then and there making the probability of a lot of fire on the floor very high. Even if the woman had been burnt somewhere else and brought back to the floor there is no way the smoke around wouldn't at least have set off the fire alarm or sprinklers.
Other mistake: In the opening scene, something catches the husband's eye through a window. He asks his wife to take a look and she gets scared. There is a dead body. When Lenny and Curtis arrive, and are lead back to the body, you can see the view from the street is obstructed. There is a display case, a pedestal, a vase and finally a wall. The head of the body wouldn't have been visible from the street and there was no other disturbance to catch someones attention: The husband and wife couldn't have seen anything.
The Collar - S12-E11
Visible crew/equipment: While the DAs are talking about their options in the case, after they first talk to the Priest and he refuses to testify, there is a few close ups of Nora's face. In most of these close ups the reflection of set lights are visible in her glasses.
Self Defense - S3-E7
Audio problem: As the Stone and Schiff are watching the news report on the security camera tape the reporter has a voice over going whilst the tape is playing. Towards the end of the tape she is shown on TV and is doing a report on the case. You can see her lips don't come close to synching up with what she is saying. The piece was already airing on TV, so very doubtful the TV station missed the large discrepancy.
Suggested correction: I'm not sure where you're getting your information, but medical doctors are involved in lethal injections more than just certifying death. This is why so many groups were actively trying to stop the practice of medical profession involvement. In 2007, 17 states required physician involvement, which included doctors at times having to administer the injection.
Bishop73
The botched execution took place in South Carolina, which absolutely forbids medical practitioners to take an active role in killing a condemned prisoner. In fact, they are considering switching executing prisoners by firing squad instead of lethal injection, at least partly to distance medical professionals from the actual procedure leading to a person's death.