It depends. They use special lights to look at luminol, and the main room light won't work under the bed or sofa. For outside killings, there are no lights to turn on, at least not until the crime lab brings in a portable generator and construction type work lights. Plus even indoors, there might be a latent print or DNA on the light switch.<quoted text> Yeah and on those CSI shows they always go into places shining their flashlites,wouldnt it be easier just to flip on the light switch every time they enter a crime scene?
That said, a lot of things done on crime shows are a stretch. For instance, I don't think there is a machine you can point at anything and get composition results in 3 seconds. Like on one episode, they pointed this analyzer at a specimen, and it came back as ethanol, toluene, benzene, etc., which are basically some of the things you find in gasoline.
How the co-workers treat each other on those shows is unprofessional, and in the real world, would earn HR reprimands and firings. Like sexual harassment, creating a hostile work environment, insubordination, etc.
The profiler type shows often go to stretches in interpreting crime scenes and behavioral cues. How can you look at a crime scene and make immediate interpretations about the suspect's childhood?
What I don't like about CSI is how in later episodes, they villainize people who do the right thing and rid the earth of genuine scum that the cops are powerless to stop. Like in one, 2 rape victims went around killing rapists, and guess who went to prison? And what gets me, it was a female sell-out, compassionless b***h cop who put them away. On another episode, a vicious bully got killed by the family of one of her victims. Again, it was the same thing. The cops made excuses for the bully and sided against the victim. What society needs are shows where people kill rapists and bullies, and do so without consequences, and thus showing the abusers of the world that nobody likes them and that someone will get them, and that if they continue what they do, others will laugh at their demise and thank whatever deity they worship, if any.
Still, with all the above, I continue to watch the programs. And I apologize to everyone for going off-topic. I brought up the one show because it illustrated toxic motherhood.