Lines per inch; refers to typesetting or printing by a device such as a typewriter or computer printer. LPI depends on factors such as FONT size and spacing.

A commercial ALTERNATIVE LIGHT SOURCE used to detect enhanced latent FINGERPRINTS.

The emission of ELECTROMAGNETIC RADIATION by an atom ormolecule as the result of some form of excitation. The emitted electromagnetic energy can be of any kind; the most familiar is that in the visible range of the electromagnetic spectrum. There are three forms of luminescence, which are based on the way excitation occurs: chemical(chemoluminescence or [...]

Also referred to as LIVOR MORTIS, the settling of blood that occurs in a body after the heart stops beating. At the time of death, circulation ceases and blood is no longer being pumped under pressure to all areas of the body. In addition, since blood is not reaching the lungs and is not being [...]

See LIVIDITY.

(1877–1966)A pioneering French forensic scientist who was instrumental in taking new theoretical ideas of what was then called police science and applying them to casework. Locard was trained in both law and medicine and was influenced by the writings of HANS GROSS as well as the fiction of SIR ARTHUR CONAN DOYLE. In 1910, Locard [...]

Rather than literally exploding as a HIGH EXPLOSIVE does, a low explosive burns very quickly and must be in a confided space to explode. Accordingly, low explosives are occasionally referred to as burning explosives. Examples of low explosives include BLACK POWDER and SMOKELESS POWDER(used as PROPELLANTSin AMMUNITION), which are frequently used to make homemade explosives [...]

A bloodstain pattern that results when blood moving slowly(approximately five feet per second or less) strikes a surface. Blood dripping from a nosebleed onto the floor creates a low-velocity impact spatter. These patterns show larger drops and less secondary spatter than medium- and high-velocity impact spatters.

Informally, “fats.” Lipids are organic compounds that are grouped together on the basis of their solubility in nonpolar solvents. Water is a polar solvent and as such lipids are water insoluble. The category of lipids includes fatty acids(such as found in butter and margarine), GLYCERIDES, steroids, waxes, and LIPO-PROTEINS. Lipids are a component of FINGERPRINT [...]

See LIP PRINTS/LIPSTICK.