Campcrytsallake

Striations

From the trailer for The Gore Gore Girls (1972).

fall

The Basic Categories Bloodstains Are Classified Into

Passive stains

Examples: pools, flows, drops

These stains are usually from gravity acting on an injured body or source of blood.

Transfer stains:

Examples: boot prints, hand prints, wipes

These stains are a result of a bloody object transferring  blood onto a surface or object.

Impact stains:

Examples: spatter, splashes, gushes

These stains usually occur when an object or person hits a static pool of blood.