The "central" chemical in this reaction isluminol(C8H7O3N3), a powdery compound made up of nitrogen, hydrogen, oxygen and carbon. Criminalists mix the luminol powder with a liquid containinghydrogen peroxide(H2O2), ahydroxide(OH-) and other chemicals, and pour the liquid into aspray bottle....
Inside the copier there is also a very fine black powder known as toner. The drum, charged with static electricity, can attract the toner particles. There are three things about the drum and the toner that let a copier perform its magic: The drum can be selectively charged, so that only...
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) in the folds of the sleeve, and use a sledge hammer to break through a wall that seems to be the point of origin for a...
But based on our research over the past two years, we believe this narrative is wrong – and wrong for reasons that go beyond mere historical interest. The misunderstanding of polio has warped the public health response to modern illnesses in ways that actually make themharderto ...
Have you seen investigators on crime shows who spray some stuff on a "clean" carpet and suddenly -- blood stains! Well, of all the fictional technology on TV, it turns out this stuff is real! Find out how luminol reveals the blood.
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) in the folds of the sleeve, and use a sledge hammer to break through a wall that seems to be the point of origin for a...
But an autopsy could reveal that the wound patterns, angle of bullet entry and gun powder residue indicate that the gun was fired while being held by the victim. The wounds are self-inflicted, so that would be ruled a suicide. Sometimes, assigning a manner of death can get really ...
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) in the folds of the sleeve, and use a sledge hammer to break through a wall that seems to be the point of origin for a...
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) in the folds of the sleeve, and use a sledge hammer to break through a wall that seems to be the point of origin for a...
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) in the folds of the sleeve, and use a sledge hammer to break through a wall that seems to be the point of origin for a...