Why do detectives always use flashlights?

They are looking for a single fingerprint, or strand of hair. Even turning a light on or opening a curtain could erase evidence. Therefore, they document the entire scene first by taking pictures, checking for all prints and using only their flashlights rather than other light sources.

Why do cops use black lights?

Risk Reactor Crime Scene Black Lights (Ultraviolet) are for close examination of the crime scene to expose evidence not visible under normal lighting or to the naked eye. Many law enforcement and criminal investigators choose between using UV light, blue light, and the right UV Orange goggles, to suit their needs.

What flashlights do police carry?

Popular police flashlights include the Streamlight Stinger DS LED HL and Streamlight Strion DS HL. Both models are rechargeable and feature high brightness beams designed to light up a room but also provide ample beam range.

What shows up on Blacklight?

Thiamine, riboflavin, niacin, fluids and vitamins shine under black light. Urine, semen and blood contain fluorescent molecules, so they also show up under black light. Interestingly, some cleaners and laundry detergents, scorpions, tonic water and antifreeze and teeth whiteners all also glow under black light.

What is Blacklight used for?

Black lights are required to observe fluorescence, since other types of ultraviolet lamps emit visible light which drowns out the dim fluorescent glow. Black light is commonly used to authenticate oil paintings, antiques and banknotes.

What flashlight do cops use?

When does the investigation of a crime scene begin?

The investigation of a crime scene begins when the CSI unit receives a call from the police officers or detectives on the scene.

What is the process of processing a crime scene?

“Processing a crime scene” is a long, tedious process that involves purposeful documentation of the conditions at the scene and the collection of any physical evidence that coul­d possibly illuminate what happened and point to who did it.

What does a police officer do at a crime scene?

Police officers are typically the first to arrive at a crime scene. They arrest the perpetrator if he’s still there and call for an ambulance if necessary. They are responsible for securing the scene so no evidence is destroyed.

How does a CSI collect blood from a crime scene?

At any given crime scene, a CSI might collect dried blood from a windowpane — without letting his arm brush the glass in case there are any latent fingerprints there, lift hair off a victim’s jacket using tweezers so he doesn’t disturb the fabric enough to shake off any of the white powder (which may or may not be cocaine)…