Factual error: Despite the fact that other officers are doing so, Columbo does not wear gloves while examining the crime scene. He also eats and drinks in the room - both absolutely forbidden - leaving eggshells scattered about the place. The crime scene is now totally compromised and nothing found can be used as evidence.
Undercover - S12-E3
Factual error: At the crime scene, the landlady of the dead man is brought into the room in order to identify one of the dead men. This is never, ever done - she could contaminate the crime scene in a dozen different ways. She would be asked to identify the corpse at the morgue after the scene had been cleared by forensic examiners.
Suggested correction: Completely wrong. Immediate identification of a murder victim is vital to the continuing investigation. As long as the landlady was under escort (she was) and did not touch anything in the room (she did not), she would definitely be asked to identify the dead man. There are too many examples to list, but when actor Bob Crane was murdered in 1978, his theatre co-star Victoria Berry was escorted onto the crime scene to confirm the identity of the dead man - Crane.
